I’m currently running an Eberron conversion in Pathfinder 2e, homebrew campaign, but I’m currently being seduced by D&D 3.5/Pathfinder 1e. It’s partially probably nostalgia from being the first D&D books I ever bought, but I never actually learned how to play or run it. It’s massively deep and overwhelming for me to start learning but i love the art and style as well as the massive amount of content.
I’m definitely looking forward to his book; the DM Lair on Youtube is also coming out with one.