Imagine FL studio or Blender designed by modern ui principles. You can select reverb, pitch, wireframe and shading mode on a big spacy sidebar. Everything else is in a scrollable menu that pops up on hover and glitches if you move your cursor too fast. Also 95% of settings don’t exist because it might confuse a user.
That's a weird take on "modern UI principles". Blender definitely does use modern UI, but also knows its users so the interface is designed accordingly.
FL? Go ahead, compare it to what we could even theoretically achieve a few decades ago.
These are also completely at odds with the text processor goals. In music/3d you've got multiple modes (recording/effects/midi-patterns/mastering/playback/... and modelling/texturing/post/...) while in text editing you've got text. Maybe an outline on the side. One favours multiple layouts and modes, the other favours simplicity and presentation.
I find that comparison hilarious because my first experience with blender I bounced off it entirely because of it not using UI standard behavior like right clicking, etc, that I was used to because of an old trial copy of 3DS Max I had. I still haven't tried it properly since then, because I'm not a 3D artist.
