Ever again sounds funny when they almost managed none as it is, even the with the easiest situation in tennis history. But will a mens player born in the 90s ever win another slam in the future? My vote is for no.
Still a decent amount of time left if guys keep playing into their late 30's. Would have to think Medvedev gets another on hard court despite how awful he looked last night and could easily see Zverev / Tsitsipas / Ruud getting a few breaks and winning a french. Hell, we're guaranteed a finalist born in the 90's at this years US Open. Alcaraz and Sinner will take a lot of them but Sinner has shown a tendency to break down physically and Carlos seems to have an incredible top level but isn't there with consistency
I would think Zverev, Med, or even Fritz/Tiafoe still have shots for the next 5 years. Likely one of those could make a run. Heck, it might happen Sunday.
Now, the real question. Will an 80s born player ever win again? Cilic? Djoker? Rafa?