yeah in some ways 3rd /pf 1e is like the MMO version of D&D. Prep time is higher, some players tend to spend hours and hours going through all the rules online looking for a surprise or to find minmax perfection. Which just makes DM prep time even worse.I have a fondness for 3e (both 3.0 and 3.5/PF1). The customization, the way rules fit together into a fairly wholistic structure - I found a lot to recommend it. I played 3.5->PF1 for quite a few years (though, given my drothers, I would steal some of 3.0 back into it).
But 5e really won me over. I've DMed a campaign up to 20th level in it and it's a lot easier to deal with than running 3.5/PF1 to the same level.
As I get older and have more things pulling on my time I do appreciate the light easy version that is 5th. Haven't DM'd a game with it yet but it just plays easier with less prep and less stress.


