Oh, friend, you have not known UI pain until you've used portal.azure.com. That piece of junk requires actual page reloads to make any changes show up. That Refresh button is just like the close-door elevator button: it's there for you to blow off steam, but it for damn sure does not DO anything. I have boundless screenshots showing when their own UI actually pops up a dialog saying "ok, I did what you asked but it's not going to show up in the console for 10 minutes so check back later". If you forget to always reload the page, and accidentally click on something that it says exists but doesn't, you get the world's ugliest error message and only by squinting at it do you realize it's just the 404 page rendered as if the world has fallen over

I suspect the team that manages it was OKR-ed into using AJAX but come from a classic ASP background, so don't understand what all this "single page app" fad is all about and hope it blows over one day