Compared to the 1970s RPGs?ORLY? Lot of folks dont find 5E 2024 to be all that radical in the new popular ideas, mechanics, and concepts department.
Isn't the the question?
Could D&D still be big if it were just 1e with the numbers jiggled around a bit?
No resets. That means to can't add or subtract much. Just jiggle a few numbers around. Change a few formulas. Add maybe 1 class or race.
With TSR or WOTC screwing up every few years.
And the internet and crowdfunding existing.