Better UI scaling option
The only way to adjust the UI size in Indesign is to change the scaling for your whole system, and even then it only supports up to 200% scaling and there is no way to make it bigger beyond that.
I got a new laptop with a HD 4k screen and its already scaled to 250% (I'm using Windows 10) but the user interface is still too small and it really slows down my workflow. Even if increasing my OS scaling to 300%+ fixed it (which it doesn't), it would still be infuriating to have everything on my computer scaled that high all the time, or have to adjust it every time I wanted to use the program. You shouldn't have to change the scaling for your entire system to make this program usable.
I just don't understand why a professional-grade product doesn't account for high-resolution screens, or even include a simple in-program UI scaling slider or option.