What does "blender's UI" even mean these days? It's been completely revamped since I last used it, which personally is annoying since I have no idea how to do a

What does "blender's UI" even mean these days? It's been completely revamped since I last used it, which personally is annoying since I have no idea how to do anything in Blender any more, but objectively is great because the old UI was... challenging... and now it seems to align much better with other professional 3D software.