I've purchased many more official WotC books than I have in editions past. Most of it has to do with personal reasons for myself - having more discretionary income, finding cheaper prices on Amazon (instead of supporting my FLGS - something I need to re-examine when my local shops reopen because I'm feeling some guilt at this), having more storage space in my house. The other aspect is that there's less 3PP material to spend money on. I bought a lot of Goodman Games, Necromancer, etc., back in the 3.x era.
A few of my most recent impulse buys (Eberron, Saltmarsh, Avernus, Dungeon of the Mad Mage) I probably wouldn't have picked up in earlier times for the reasons above.
A few of my most recent impulse buys (Eberron, Saltmarsh, Avernus, Dungeon of the Mad Mage) I probably wouldn't have picked up in earlier times for the reasons above.