(Along with AMOS, MUI was often a target. Quaint these days, given our current UI behemoths.)
This opened a chance for Amos.
If you have a look at today's leet-ness, have a look a The Black Lotus. They do everything with a cross-development pipeline, they even forked Amiga UAE to streamline their process. TBL is really top notch Amiga coding, fantastic stuff.
Amos and cross-development compile to machine code in the end. Besides that it is about easing things.
For reference, here is Abyss' fantastic project: https://github.com/BartmanAbyss/vscode-amiga-debug
Same goes for Basic on C64. It is not that I dislike Basic. It simply the fact, that you get different results using assembler on C64.
And in practice I recall it was also slow for doing things like bigger scrolling things - like isometric RTS map, SimCity ...etc
Reminded me a lot of some of the quick-shot productions me and my friends used to do back then! It was very satisfying to do these little single-screen things, sometimes in a single day/night, that were perhaps (eh) less about showing off massive technical chops (never my forte, especially not back as a teenager) and more about mood, sometimes humor, or simply just ... saying something. Then when the thing was done, you got to start spreading it by (of course) using your modem and uploading it to some choice bulletin board systems.
Amazing that Datagubbe (which by the way is translated by the author [1] as "old computer fogey" although I feel the Swedish word "gubbe" is really hard to translate well) wrote this in AMOS by the way, I used that a lot but mostly for tooling and general playing around, never for any released productions, they were always in assembly.
[1]: https://datagubbe.se/colophon/