One common case I notice this is with FFMPEG. Everything that saves a video needs its own dialog with different settings. It would make a lot more sense if you had 1 single polished FFMPEG frontend that everyone just streamed data to.
On the other hand, I'm afraid that if this did happen that FFMPEG frontend would look like a GNOME app and I would hate using it.
This is something I like about lots of web apis.
Want to generate a video, it's just a few lines of code. Want to connect the user's camera (with permission), it's just a few lines of code. Websockets? About 4 lines of code.
There could be 1000s of options for each of those but they mostly distilled it down to what most people need, and they're cross platform.
Me, on the other hand, love ffmpeg, because I notice my ytdlp using it and my vlc player sometimes using it and I have two homemade powrshell scripts using it to convert flac to mp3 and whatever. I don't want to open a program and figure out it's UI for those things. It has a job, it does it well, you can sort of pipe things to it and I'm very happy.
I'm just glad that we have one very polished backend, in FFMPEG itself.
My favorite frontend is MPV, because I can generally forgo a GUI and just use single keystrokes to do everything.