- Q: How do Adaptable, Down the Rabbit Hole and Arcane Research interact with Innsmouth scenarios and interludes where experience is not allowed to be spent? A: You can use Adaptable in between any scenarios in Innsmouth. You cannot use Arcane Research or Down the Rabbit Hole during times you cannot spend XP – essentially, you are unable to “upgrade” cards at these times, even at a discount.
Talent.
Permanent.
In between each game of a campaign, you may swap up to two level 0 cards out of your deck in exchange for an equal number of level 0 cards. (You must still follow all deckbuilding rules for your investigator).

There are quite a few people that I have already heard giving this a sub-par rating, but I couldn't disagree more. I think that this card is an auto-include in any rogue deck that can pick up a level-1 upgrade such as "Skids" O'Toole, Wendy Adams or Jenny Barnes.
If you are going to swap out a single card (ever) this has already paid for itself. You can put off paying for it until you are going to want to swap things out, but honestly there should always be considerations of swaps in decks after you start playing it. No one's deck and design comes out perfect. Decks start out with certain themes and elements and should always find tweaks and personal preferences.
As we are playing, new packs come out all the time. With those new packs come other level-0 cards that you will most likely consider. And when you can swap them in for free with your current deck on the fly with those releases and become much easier to get those new shiny toys interacting with the cards you have been building around.
So far, it has already saved me 4 experience. Would all of those been done if they weren't for free; no (perhaps 1 or 2). It lets you be "adaptable" and improve yourself. Challenge your deck after every play through and every pack release. I think this is amazing. And paired with Charisma coming out in the new pack, I will likely use Adaptable again to build some additional allies themed into the deck after this purchase so that I can get a nice array of different characters for my Jenny Barnes deck and build on a nice new style of play. So, while others are seeing this as mediocre, I wanted to put my opinion out there. I think this card is amazing.
The previous reviewers have stated the benefit(s) of this card: providing versatility and the ability to make changes in your deck later in a campaign. A good example someone gave is with Sleight of Hand. Until you spend the xp to get Lupara, you don't need Sleight of Hand yet.
Correct me if I'm wrong, but Adaptable also lets you swap out the out-of-faction cards in your deck too!
For example, the Dunwich Legacy cycle investigators (Jenny the Rogue) are allowed up to 5 level 0 cards outside their faction. With Adaptable, you can choose those 5 colors to serve a particular purpose (maybe, make Jenny into a decent clue gatherer with Seeker cards). Then, once you have the xp for the amazing Rogue clue-gathering cards (Lola Santiago, Lockpicks), then you can substitute those Seeker cards for different cards (maybe something to make her more able to handle enemies so she can investigate locations alone).
TLDR: Adaptable lets you swap around level 0 cards, across ALL factions that investigator is permitted to include in their deck. Versatility, from being "Adaptable", can improve efficiency and survivability.
The card is nuts! I always buy it if I can.
If your deck-building game is strong you can probably go without it. But when I play with my GF we never spend much time on building a new deck. We grab all the cards we consider good for the build and go with it without a second thought. Of course we never have clear idea about what upgrades we will make. This means rarely sub-par cards are taken with the idea they will shine once certain upgrades are done. And having to spend XP on level 0 cards we failed to take initially is a major pain.
Here comes Adaptable! You can start with whatever cards you want and once you grasp the dynamics of the investigator and the team needs , you can make changes accordingly. Last time I played Finn, I started with 25 unique cards (single copy). With Adaptable I easily got second copy of what proved good, and dropped the useless.
Why take Sleight of Hand from scenario one? Why not take the Luparas/Typewriters/Derringers first and swap cards that help more in the early campaign?
Lots of freedom to change your deck at little to no price. For me that card is pure value and if you are not playing it - you should!!! There is not a single drawback I see.
Bonus point: thematically it makes perfect sense rogues to have adaptable decks :)
Almost everybody can take Down the Rabbit Hole now using Versatile and In the Thick of It. Though you don't purchase the cards you swap you should be able to swap Down the Rabbit Hole on and off your deck.
During upgrading you can first upgrade your cards with reduced xp cost, then swap Down the Rabbit Hole for another card an then buy new cards.
During next upgrading do the other way round, first buy then swap and upgrade if necessary.
You could even use Adaptable twice to do it on the same turn.
Or am I wrong and abuse this too much?