I like to practice minimalism, I’m constantly donating and throwing out stuff that I haven’t used in some time.
That said, I’ve got my IPP, and I still have a now aging MacBook. I’m working toward migrating all my stuff to my IPP, using iCloud. Books, comics, movies, music, tons of stuff, out of Dropbox and into iCloud. I’ve gotten rid of physical books, CDs, DVDs, photos...all in the name of minimalism. I can see myself getting down to just using an IPP for nearly everything.
Unfortunately I can’t do things like put music on my Apple Watch for when I go running with the iPad alone. I have to keep my MacBook around for those sorts of things.
Readdle’s documents app let me do mostly anything on my iPad that I can do on my MacBook. I can’t use the pencil on my MacBook. I use the Pencil a lot for studying and taking notes.
The important part of minimalism is to get rid of things that you don’t need, don’t use, and are weighing you down. My Apple Watch is helping me stay healthy (so I need the MacBook) and my iPad is helping me study. I see nothing wrong with keeping those items, and when they have outlasted their usefulness, they will be passed on.