From a technical perspective, they didn’t remove it or any of the other missing features from the taskbar since the win11 taskbar was built from scratch without any of the old code for 10. For whatever reason, that feature wasn’t prioritized in the new taskbar build so it wasn’t built yet, or they didn’t want to add it.

I still think their decision to not allow the new taskbar to be placed on the sides or top is really stupid though, as someone with a 32:9 monitor, I’d much rather use some of my horizontal space for taskbar rather than limited vertical space.