Had that discussion last year with some dude thinking that during the years 2016-2018 his gtx 1080 had become much faster. But performance was exactly the same in several synthetic benchmarks like 3D Mark comparing with early 2016 results.
Maybe in some specific games performance has improved, more often I think Nvidia has just fixed errors. But if you don't experience specific errors or problems, upgrading a fully functional driver may not do much and can be a source of new errors. Valve recently recommended Forceware 417 for the Index just as an example that newer isn't always better.
