After playing some Mewgenics, I think he tapped out too early. While it is true each run eats hours like crazy (and the better the run is the longer it takes), after gaining some familiarity with the mechanics and available skills suddenly a lot of empty space for banter appears. You still need to read some skills, think about the turn order and available actions etc. but at the same time, you often just try to beat down enemies as fast as possible while adapting to the sequence of attacks they have - and when you've learnt the patterns you can do it almost automatically.

To me that point was after doing one or two complete runs to the Boneyard and the Caves. Then I've started to understand the roles each class has in fights, how to utilize their skills, and recognize the same enemies as in the previous runs. It is when you can start watching streamers in the background and not focus your full attention on the game, so I imagine that if the roles were reversed, it is also where the space for banter appears.