Yeah. I will probably join their ranks at some point.

Bash maintainer actually implemented the library feature I suggested and it's already dramatically cut down the amount of unsightly bash code I need to keep around and maintain.

I'm getting pretty tired of coping with old stuff just because it's there though. Went through this phase with GNU make too.

... and many also have succeeded. fish would not be as popular as it is otherwise, other alternative shells that break bash compatibility are being worked on and are gaining traction, elvish, nushell, murex...

mixing shells is not as hard as some people claim. it's like switching programming languages. i do that all the time. but then, i avoid bash scripting as much as i can (or shell scripting in general). if you actually enjoy bash scripting then switching may be harder.