[wildredkraut]

Well, another thing is, that old UI’s used to have no heavy animations, that feels slow because the users actions are not instantly triggered. You clicked on something and BAM it was there, without any complex animations. Frustrating animations came to later Windows Versions. Iirc there was switch offable minimize and maximize animations, that all.

[gochi]

This has very little to do with animations, as most OS use of complex animations tends to be handled very effectively (ie mission control on Mac or the task view on Windows 11). They do all of that while also handling complex translucency effects and not breaking a sweat, even on $500 hardware.

When you are launching a program and it doesn't do something immediately, this has far more to do with networking, external layers like antiviruses pre-scanning, infected device, or app(s) hogging available resources.