I buy some physical books, but mostly either borrow from the library or for some rare stuff I aquire backup copies from various places online.

If there is a graphical element to a book, like an atlas, or even books like "House Of Leaves" or "pallbearers club" where the ebook is inferior due to the formatting and typesetting, I'll buy the physical copy.

Recently I've been buying really premium versions of books I reread like the deluxe slipcase of LotR and other tolkien stuff (histories box set is next on my list) and the Akira box set. These are things I read every couple of years so I just like to have and hold the really nice stuff.

I also usually like to get physical copies of RPG books because it's faster to use at the table and I don't get distracted by a tablet. The physical version of Mork Borg (and feretory + heretic) is in itself a work of art.