This has appeared multiple times over the years as “compiler improves c++ errors” and is even the reason given as motivating things like concepts. Sure it keeps improving but the errors don’t seem to actually get smaller. The problem is inherent to templates - c++ got it wrong by having templates start weakly typed and it has no mechanisms to correct it in the language - concepts helped but didn’t definitively fix it and also are a serious level of complexity (ie for writing and defining concepts) - it just shifted the burden one level but ultimately the mess is still there.
After more than 20 years in c++, I gave up that the situation will ever really be fixed vs constantly being made better at the margins, but not as fast as new ideas get added to the language.
After more than 20 years in c++, I gave up that the situation will ever really be fixed vs constantly being made better at the margins, but not as fast as new ideas get added to the language.