I honestly believe you could win the Cup with exclusively 30+ y/o's on the roster, especially now with where sports science is at.
But they have to be carefully chosen, with all the roles accounted for and play commensurate to their cap hit. Can't tie yourself up to ridiculous long term deals at fat AAV's for short term returns. You get those sneaky upside vets at near league minimum, and you get equivalent output to many ELC's.
I thought Sid was magnificent 2-way in 2018-19 at 31. That's the hardest I can remember him busting his ass for a season. That was not a great team around him at all. What a waste!
Malkin in 2019-20 after that summer training when he got totally ripped...the best 5v5 producer in the league at 32.
Letang was brilliant the previous 2 seasons at 33-35.
It just has to line up. Look at what we just got from Zucker at 30.
Acquisitions like Smith at ages 32 and 33 will surely be better than many good 25 year olds.