Well, kinda...
I got the core books from the initial Kickstarter.
After the OGL debacle, when my ire towards WotC was at its height, I was too angry to even look at an official 5e product. Luckily, my 5e game at the time was finishing up its Original Adventures: Isle of Dread campaign. With the massive amount of treasure from that adventure, they were ready to move on to another quest. I picked Necropolis from Frog God (the 5e update of the Gary Gygax adventure).
At that point, I kept Level Up behind my screen. I didn't use a single WotC product, though my players continued with their 5e characters. And I think they completely overpowered Necropolis, largely because of the Monty Haul nature of OAR: Isle of Dread - and its gold piece awards not being in line with the magic item economy of Level Up. And they overpowered Necropolis until they got cocky and completely fell into a trap and had a TPK.
As far as where to go from here, I am wrapping up running a PF2e adventure path and a 9 month campaign in D&D 4e. I need something even less complex than 5e to recharge my batteries.
If I ever want to go back to a 5e-like game, I'll likely do Level Up. I haven't used an official WotC 5e product since the OGL debacle. (In fact, I've sold most of them to a used book store.)