I use a mix. Sometimes, I'll read stuff in the foliate app on Linux from my desktop outputting onto a big screen tv.

But I also do an old kindle while lounging on couch/bed and Librera reader on phone (android/f-droid) when I'm on the shitter.

For the most part, I load different things on each and just jump back and forth between several stories. Keeps things interesting and no need to sync bookmarks and whatnot.