Every time I hear something like this, I want to push back that back in the day, everyone played very differently, different DMs, different emphasis, different styles, different variants, and different beliefs about what the 'by the book' rules actually were (often
very different). Nevermind that, on top of that, nostalgia makes memory all the less dependable.
But, I realize that is wrong-headed of me. OSR is not how D&D was played once upon a time. It's a modern play style, like anything else popular today, just one that looks backwards for inspiration.
That said, 5e is the latest DM Empowerment edition - and also looks primarily backwards for inspiration, just not at all the same things - and you can
make it OSR compliant, just like you can force balance upon it. You don't even have to change the mechanics that much, overtly (like, you don't need extensive written variants), just ignore or radically re-interpret them when they don't work for you. (we
certainly did that back in the day! It's what EGG was talking about when he said "the secret is, you don''t really need the rules" [paraphrase, I don't remember the exact quotation]) Not every ruling needs to be a precedent to be written down and adhered to in perpetuity, each situation may be different.
Which is why every other edition of D&D suffers from the 5MWD - or the DM force needed to negate it.... or... well, quite enjoys the 5MWD and the "weird wizard show" EGG warned us about.

It's subjective/stylistic at that point.
Of course, aside from being dismissive and maybe even "gatekeeping," the admonition to 'go play another game,' when D&D is the only game anyone outside the hobby anyone has ever heard of, so has all the vibrant, new players, and there may be no game that does precisely what you want, and even if there is, it may be so obscure there's no one to play it with, and, even if it's a past edition of D&D, it might not be legally supportable due to a highly restrictive GSL (OK, that last is just 4e, but you brought it up).