Currently have seen one episode of this season and likely keeping:
Mashiro no Oto
Seven Knights Revolution
Sayonara Watashi no Cramer
Godzilla: Singular Point
Quite a few other plans as well, but either not aired yet or waiting for v1.
I tend to have more trouble with older stuff (and Netflix anime, since these are released in batches), it's much easier for me to watch new episodes weekly than all of them at once. Even just getting through my backlog from some seasons where work got in the way can be tough, although at least I finally managed to get around to finishing Railgun T yesterday as well.
I mean 12 episodes, if you skip openings and endings is only like four and a half hours. Not really that long. Even people working full time could potentially do it.
Depends on the series as well, I guess. Some better ones I could probably do, but often I just feel like I've had enough for the moment after a few episodes.