I cant help comparing it to ancient stateful Java web apps which were a pain to use. What is different this time so that it can outdo the hard-won victory of st

I cant help comparing it to ancient stateful Java web apps which were a pain to use. What is different this time so that it can outdo the hard-won victory of stateless servers over stateful servers? The apps I know were: 1. Freezes and needing a refresh/logout after the server-side "actor" or connection fails. 2. Refresh won't actually work, you need to login again. 3. Neither does back/forward, hence the big warnings not to hit back button, for example in a paginated list. Hitting back makes it freeze. 4. Extreme latency. 5. No shareable urls or hyperlinks possible, two tabs in same browser will sync with each other.