I completely agree that ScetchUp is very easy to use UI but I still think that Truespace takes the cake and the refrigerator too because ScetchUp was built for beginners , Truespace was built for professional , and feature wise they are light years apart.
Blender 2.8 is definitely a big improvement but with such complex app there is always going to be light years of of room for improvement.
Everything is complex , you think 3d modeling is complex ? At least it has 2 major paths, subdivision surfaces/polygon modeling and sculpting. Audio synthesis in computer music has around 7 (additive, substractive, fm, wavetable, spectral, granular and sampling) and those are the basic one. If you want fancy ones there a ton more. That is only the sound generation. There is then sound effect, midi composition, live performance, mixing, post processing and much more. I am not including music theory in the mix, only the purely technical/technology orientated stuff.
As a matter of fact audio synthesis popularised node systems that we take from granted, back in 1996 . Reaktor and MAX/MSP being the most popular , they are so powerful that can put any node system to shame with how deep they go in terms of coding and some allow for even low level assembly code access which is kinda insane because how CPU intensive audio synthesis used to be.
Nowdays ironically they have fall from favor mainly because modern CPUs are more than enough for the most demanding audio synthesis tasks. Ironic because node systems in 3d graphics have become all the rage. Styll modern soft synths are extremely modular.
So computer music is not any less complex. But learning it is far easier mainly because music applications have always chosen simplicity over power. They give you the full GUI treatment but they always come with an “Easy mode”
“Easy mode” is an optiona GUI layer that displays only a fraction of the “advanced mode” GUI and is made not for beginners but professional that cannot afford to waste time with complex setups. If you want to go down the rabbit hole you press the “advanced mode” button and it will give you the entire GUI with all its complexity. It way more than collapsing menus by the way its really an entirely new GUI. So GUI designer cut no corners there.
Its also a diffirent mind set, musician in general loath anything that makes them wait , as live performance is pretty much all the rage, while 3d artists worry more about realism and are willing to wait hours of rendering time to get it which is why it took so long to popularise real time rendering in 3d apps even though it existed since the Age of Noha for games.
This is also the direction most likely I will go which I considered a far better GUI direction that trying to “cleanup” a complex GUI. Cleanup is extremely important too and I am glad Blender 2.8 does that, but you can go only so far with it.