[hansflying]

Unless you have at least 20 developers for Frontend alone, don't even bother with SPA applications. I assure that the result will be much worse than a regular web app with server side rendering and some AJAX. The only good SPA applications I've seen were developed by huge companies like Microsoft or Google and smaller companies don't have the resources for that.

[krisrm]

I'm deploying a simple SPA I wrote as a sole developer for a client later this week, and the clients have been thrilled with it so far. I've written less code than in other traditional webapps, the app is responsive and works well, and I know that sudden changes in server infrastructure (they're on-prem hosted and looking at moving to a Windows/IIS environment) aren't going to require a full-on rewrite.

I think that's probably the sweet spot for SPAs though honestly - small scope internal apps (served over relatively quick intranet connections) with access to minimal client infrastructure (all you need is a web browser).