Never been a fan of 5e and I stopped playing D&D (1e) back in about '83. Switched to running a hybrid Runequest/Rolemaster/HarnMaster homebrew game. Honestly. don't think I ever player of game of 2e AD&D, 3, 3.5 or 4. The main reason I came back to 5e was, easier to find players and the robustness of Fantasy Grounds' 5e automation. Seeing the new OSE kickstarter got me back into wanting to play older versions BUT re-reading through all my 1e stuff I decided I'm too old to relearn that all over again and be able to run games. I started my D&D with the original boxed set and figure I'll give OSE a shot. It seems pretty well written with a clean layout in the books. Plus, there is already an OSE ruleset for Fantasy Grounds. 
There is a full-blown 2e AD&D ruleset on fantasy grounds. I have been considering purchasing the core three to run a VTT game. I honestly think 2e is a very clearly written ruleset. Of course, you do not have the wonderful Gygax prose to conflate concepts and mechanics. We played 5e briefly at the house when it first came out. While I liked it significantly better than 3e or Pathfinder, I found it to be a bit bland and the characters really had no limitations. Anyone could be anything without any drawbacks. While I can understand why some like this freedom of choice, I think it removed the danger and sense of dread about what lurked around the corner. Anyway, there are many editions and versions of official D&D to choose from, and with POD and PDF files any of them are playable.
I did look at OSE but honestly, I just felt like if I wanted to play B/X D&D I have the book and Rules Compendium or if I want to play AD&D I have both 1e and 2e. So it did not hold me in that regard. I played Castles and Crusaders and Basic Fantasy RPG for a while and really liked both sets of rules and would recommend them to anyone. But for me, I just like my comfort RPG of choice, and like you do not want to learn new rules.
