I am endlessly annoyed by slow interfaces. At $DAYJOB I have to use a web and desktop GUI for managing CheckPoint firewalls. These often will freeze for dozens of seconds, and generally make my computer crawl. I feel that this should not be acceptable in 2023.
I know why the web for UI took over, but I sure do miss Windows forms-based applications. The web is fine for the UI to a bank or some other tool you don't interact with that often, but for tools where you can spend hours working inside, browser-based interfaces are terrible.
And yes, I can probably run the management software in wine, but I will avoid it if I can.
This is probably not a problem of the principal slowness of the software. With a high likelihood (source: personal programming experience of my colleagues and me), the root cause when the GUI freezes in such situation is typically rather that some operation that needs a little bit of time (say, a server request) is done in the GUI thread, thus blocking the processing of any other event (message). Windows programming is very sensitive in this regard.
Sounds like its worse than that.