Y'know, all through the edition war, it was "why don't you just play Pathfinder, it's an outright clone of 3.5 with ongoing support, literally everything you want," why keep hate'n on the current ed for being balanced and having a Warlord?
Made no impression. And, really, why shouldn't a fan of D&D expect to reprise his past glories in the latest ed? It's not really too much to ask. 5e mostly does that, anyway. You can play about any 2e character, even a Bladesinger, any 1e character - who wasn't psionic - 3e characters are, well, there was a lot to 3e, but, everything in the 3e PH1 you can absolutely play, 4e, no, no Warlord (even tho from PH1), no Avenger, no Warden, no Shaman, no Invoker, no Swordmage, no Psion, Battlemind or Ardent,
...But, at the time, in 4e, similarly, every class that was in 1e or 2e was in 4e; the 3e PH1 classes, were all there, even a lot of the PrCs became Paragon Paths, and there actually was psionics.
And, while 3.5 was cloned, and is still covered by the OGL/SRD, anyone can publish yet more support for it at any time; and the TSR era has scads of OSR imitators, 4e is limited by the much less permissive GSL, which requires WotC approval... and last I'd heard they'd stopped answering inquiries about it. Technically, under the GSL, and 4e supplements or clones for 4e can be ganked at any time, WotC hasn't bothered doing that, but for anyone thinking about entering that underserved 3PP market, it's a consideration.
It actually is a different situation.
Oh, 5e. 5e.2014 is about to be rolled to 5e.2024 - it already has an OGL/SRD, tho, and even went into the creative commons. Shouldn't be a problem if something in the one doesn't show up in the other? They're even compatible.