Here is an example:
I have now ran Budgie side by side (separate install on new partition) with Gnome.
As a Gnome user I am not used to the (any) app menu (well in windows, but that's not auto-categorized), and I find the fact that Linux apps have their own "tags" (I assume?) that puts them automatically in different categories very annoying. And I assume the same apps end up in the same category regardless of distro or DE? So this is not a Budgie problem?
Because believe it or not I find it easier to find apps in Gnome than in an app menu that is utterly random:
Some image viewers end up in "graphics". Eye Of Gnome is under "utilities". Because... frakk you, I guess.
Gnome System Monitor is under Utilities and not under System Tools, because a program named System Monitor that you monitor the System with has nothing to do with System Tools. Right?
Htop on the other hand ends up in System Tools.
Same with a large number of other apps that just... puts themselves wherever. At least two other actual tools to handle the System is in Utilities and not in System tools.
Now there are other annoyances specifically with Budgie, like a lot of apps not showing up said menu until reboot. Which is something I have not noticed in Plasma nor XFCE.
I like Budgie very much despite my initial rant against it here, but some small things are very annoying.
But then on my Gnome installation I can't uninstall OpenWeather, because every time I try, Openweather just launches a new instance of itself (Right now I have three openweather applets running on he top bar side by side after trying to uninstall it twice).
Oh and Workspace To Dock breaks every time ANY other extension is updated.