The thing you want is called "getting old". You realize the benefits of certain things and know about the weaknesses before they are even brought up. Sadly this can't easily be taught - it is just slowly learned. And yet us old farts continue to be shunned in many parts of the industry (perhaps because we are grumpy old curmudgeons who have seen it all before).
I think programming languages can bring new things to the table. For Go that's M:N userspace threading combined with a shared-everything mutable memory model in a high level language. For Rust, it's memory safety without garbage collection. For JavaScript, it's the event loop model. Those crucial differences make languages usable for unique niches where you won't want to use anything else.
Unfortunately, most of the debate around languages involves "philosophy", where there's little objective measurement that can be done: composition vs. inheritance, the effect generics have on readability, whether immutability is a better way of reasoning about data, whether namespace syntax should use double-colons or periods, and so forth. These debates are endless but don't strike me as very useful: the exact issues that get brought up and argued on HN have been going back and forth largely since the '80s if not earlier, and they're neither interesting (because we've made little progress on consensus) nor relevant (since people who actually need to choose a language based on its merits will choose it because it helps their job, not because of philosophy).
