It's such nonsense. I have never seen a "2d20 hater" be able to actually articulate what they hate about it, unless they are just dead set against metacurrency.
I mean, you can a big steaming dump on people's tastes because they aren't the same as yours, but that does absolutely nothing but harden people's dislike, and make people think fans of that system are mean jerks. I'm sure I've been guilty of this at times. It can be cathartic. But it's not effective or helpful for anyone but you.
Most people, very much including nerds and grogs, aren't good at articulating what they dislike about any system. That's not just true in RPGs, it's true in videogames and boardgames as well. In fact, it's such an issue that videogame designers that there's a whole complex discussion around how people "displace" more generalized dislike on to specific mechanics and factors, and designers find that, even when you resolve the specific stuff, in some cases (not all, some), people are still just as annoyed by the game, because it turns out there was something more complex frustrating or annoying them, they'd just focused on this one factor.
I'm better than most at identifying and articulating rules issues, but even I can't actually say precisely what I dislike about 2d20, just that the three times I've played it recently (Achtung! Cthulhu), I didn't like it, it didn't feel good, it didn't produce compelling results. I wished we were using another system. The same was true for everyone in the group except the DM and one player who just doesn't care about systems at all. I'm sure in other groups it might be the reverse. I wouldn't call myself a hater, but it's definitely an anti-selling point is an RPG uses it. The meta-currency factor I think is part of it, but it can't be all of it because the same group has played and liked games with meta-currency. I think overall the feeling was that wasn't enough juice for the squeeze, but yeah that's imprecise as you say.
Either way, clearly 2d20 does, as you seemingly acknowledge have "haters" and hyper-fans, which I think is kind of unusual in a TTRPG rules-set that is used across multiple RPGs. Plus it's not super-accessible - or at least Achtung! Cthulhu sure as heck isn't.
I'm definitely not a fan of the 5E rules-set these days, I think we all know that. Nor a hater. But I would definitely pick 5E as a starting point over something like 2d20 or SWADE if I wanted to make an SW RPG that went really big and which was about, y'know ALL Star Wars, or modern Star Wars specifically. One which might equally be played by someone aged 50 or 30 or 12. One which could be Rebels or Andor or the OT or the ST or the PT. Though as noted I'd pick "specifically designed for SW" over any pre-existing system.
If I was going for a more nostalgia-trip/coffee-table book appeal, like focusing on the OT maybe, and wanted some people expert in making that kind of game and marketing it to middle-aged gamers then I might not only go 2d20, I'd get Modiphus specifically to do it. And it would sell - in the short term anyway.
