With most SPAs actually, as a user, I get less responsiveness due to overcomplicated UIs and memory leaks and, for instance while browsing in train, bad handlin

With most SPAs actually, as a user, I get less responsiveness due to overcomplicated UIs and memory leaks and, for instance while browsing in train, bad handling of poor connections. Facebook is a great example. It's almost impossible to have it opened for a long time in a few tabs simultaneously on a PC with 8 GB RAM. I often end up switching to m.facebook.com full page load version, cause it just works and it works fast.