I had one at Tercero Grenache Blanc at maybe 10 years of age, and it had evolved a great deal (darker color, truffles and petrol on the nose, fruit receded, more complexity), but it was still quite good.
Granted, that is not a wine designed for decades of age, but it convinced me that the “screw caps just preserve wine in its youthful state and don’t let them mature and evolve” view was incorrect.
I’m also pretty certain that same 10 year old grenache blanc would have been something to pour down the drain if it had been finished with cork.