The problem with such games is that there's a lot of bad stuff that people are nostalgic for. For every bad rule that you might want to strip out, there are people who won't think your OD&D is original enough if you don't have it. Swords & Wizardry even has two AC systems that it uses side-by-side: the old-fashioned 9-down system that they have to include for tradition's sake and the 10+ system that they have to include because it's just clearly better....The 'bad stuff' I'm referring to is stuff like: too much arithmetic (5% XP bonus, copper pieces, etc.), wonky XP progression per class, too-random character creation, and poor class balance. It also has the problem that didn't get fixed until 4e: all spells are daily, which makes spellcasters play too differently from the fighters.
I suggested he might like Microlite 74, and he thought it looked "pretty cute" - a compliment I would say. :)
But what I find interesting here is how he jumps to the conclusion that it is nostalgia that drives interest in the Old School movement. Oh, sure - there is some element of fond remembrance for some of us - but not all of us, and it certainly isn't the main or even significant driving factor. I was also rather surprised, actually, to discover how quick he was to label some rules as "bad" and various "problems" with the game that were "fixed" in 4th Edition. In truth, I am still curious about how he came to these conclusions, but I think it is telling that someone of Jonathan's creativity has reached such definite conclusions.
Beyond that, I also noticed that he implied that "bad rules" were retained by Old School gamers as a kind of authenticity test. I noted in my comments to him that such an attitude was not considered appropriate by Old School gamers; "doing it right" means doing it the way you want to. I'm still bothered by his implied criticism, though. Who are these "people" he's referring to? It can't be only Old School gamers - lots of games have fans who want to play "by the book." My suspicion is that he's half-remembering gamers who wanted everything to be settled by the "Sage Advice" column in The Dragon more so than gamers who were playing between 1974 and roughly 1978. (I could be wrong about this, but I do wonder....)