Recently I got really interested in debloating and hardening my operating systems, cause I’m heavily inspired by Unix and “worse is better” philosophy. As I heard bash is heavy and we have much more lightweight and faster alternatives like these mentioned in title. They must be great alternative for scripting and interpreting but is there any reason to use them on my machines as interactive shell? Anyone are using them? Also is it worth to learn them as bash is standard IT industry?
Debloating a system for a tiny appliance device is worth it. Debloating on a machine with a modern processor, 16-64 GB ram and a TB harddrive is not necessary. You may not even notice a difference.
But if you enjoy that stuff, go for it.
I have only used KSH for a proprietary software install that needed it, it didn’t feel much different than working in a BASH shell.