For "linear fiction"[0] I use an e-ink reader exclusively. I also re-read books pretty much never. There are way too many excellent books I haven't read yet, so why would I spend time redoing something I have already experienced? I can easily hi-light stuff on the Kindle and check them out from Goodreads if I need to later.
For books I read for work and other knowledge stuff it's either PDF on an iPad or a web page. In some rare cases a physical book, but stuff tends to move so fast paper reference books expire too fast to have any advantage compared to asking a large language model.
If I get the urge to make any notes from this category, they go into Obsidian.
[0] Books that are read from beginning to end with no need to jump around to check stuff you read before. Could be a biography too, which isn't fiction per se.
For books I read for work and other knowledge stuff it's either PDF on an iPad or a web page. In some rare cases a physical book, but stuff tends to move so fast paper reference books expire too fast to have any advantage compared to asking a large language model.
If I get the urge to make any notes from this category, they go into Obsidian.
[0] Books that are read from beginning to end with no need to jump around to check stuff you read before. Could be a biography too, which isn't fiction per se.