[badsectoracula]

None of the above require software to be as slow as it often is.

Windows being able to run Win32 applications isn't what makes Windows Calc slow nor is anything else you mentioned - you do not need a supercomputer to download currency conversion rates (which, btw, is bloat by itself and could be handled by a dedicated program instead of being shoved into calc) and even the ability to download a CSV or whatever from a remote server via HTTPS (all you'd really need to make such an update) is something the OS can provide to every application and keep secure for everyone (and you know what, this sort of functionality was something Windows provided ever since Win98, but how many people use it vs bundling their own?).

[hnick]

Calc is my favourite example too. Win+R+calc+enter and start typing, it used to work no matter how fast I was. Not anymore, I sit waiting at its convenience.

Android is pretty inconsistent too, the same series of steps are instant or hang the UI for 5 seconds depending on the current moon phase or something I haven't worked out yet.

[userbinator]

The Windows 10 calculator even has a loading screen. The UI is hideously large. It's like a joke of what "modern" software has become, except that it's actually serious.