I think the base game is quite cheap and there are a handfull of dlcs that are really meaningful, which you still don’t need. Also the base game has gotten updates for at least 5 years now so i think it’s fair. And it works good on Linux.

Edit: It’s from 2016, so no wonder there a lot’s of dlcs. The base game has gotten overhauls in the meantime.

That works too but for me it’s mentally simpler to pull another finger than having to press with the same one i use to move over the touchpad.

Mouse heavy games, e.g. Sterallis, you simply move the cursor with the touchpad and click with RT or LT and it works wonderfully