Comment by winslett

SPA's #1 draw back is that you have to rebuild browser functionality inside of the browser.

The browser natively handles internet connectivity, back / forward buttons, refresh buttons, URL management. Additionally, users have been trained to understand the responses, hit the refresh button, and use the back button. Browsers have gotten better at distinguishing between your internet being down and the website being down.

Good SPAs have to rebuild all of that functionality.