In my experience as a user, these SPAs built by very large companies for a very large audience seem to be full of bugs & issues when they try to do to much. So

In my experience as a user, these SPAs built by very large companies for a very large audience seem to be full of bugs & issues when they try to do to much. Something like a music player seems to work great as a SPA. But something more complicated like Google AdWords or large financial apps & you're bound to run into issues often.