I don't think I heard "SSR" in a context where it's just about backend HTML generation like we did in the olden days, only when it comes to reify JS views on the server. Haven't heard of an embedded JS interpreter or transpiler that does that.

When it comes to generating dynamic or static web page content, the pathological framework-aversion of the Go community strikes hard. Probably nothing that doesn't use the built-in Go templates with any sufficient user backing. This doesn't appear to be a language that can birth something like RoR.

As for the maintainability of react, I'm not so excited. It's a pretty decent templating system, and it seems easy enough to compose components, but beyond that it's each to their own, with some approaches being better than others. And redux still doesn't grab me as that great, it's just the sheer amount of developers resulted in a nice toolset. Whether it's frontend or backend, the twin async and dependency hells of JS don't manage to make me sleep any better, either.

I don't give a flying frick for age myself. Sure, there's less tooling for partials than for components, but that might have a reason.