Being old grows ecosystem. Lits of progress in N64 decompilation, & behind that is https://github.com/Fast-64/fast64 for using blender in romhack development
A vast, vast array of features. Multiple new renderers, material systems (lumping node systems into this), 2D animation systems (mostly via grease pencil AIUI), video compositing features, sculpting (I think is new since then?)
I mean, even if you aren't using it now, it's probably worth looking at e.g. the latest release notes https://www.blender.org/download/releases/4-3/ just to see the array of things improving and adding onto stuff that mostly didn't exist 12 years ago.
I remember Blender back then. The days of watching squares slowly render over 2-7 minutes each for some cool project I made with lighting.
Has much new been added to editing/functionality or just speed optimisations?