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?
Dash is not a a Bash alternative, it is an sh alternative. You definitely should not replace Bash with it. If your goal is to learn career relevant skills, stick with bash.
Bash is 10-16KB of ram, dash is 3-5KB of ram. Does it really matter at that point?
Dash’s more significant feature is its speed. It’s not meant to be used in place of bash at all, its meant to be symlinked in place of sh to give you a faster and smaller shell with a simpler and more auditable codebase.
I could imagine an it would matter more to people working with embedded devices.
Also some people just like learning or doing random things. Nothing wrong with some exploration, discovery or learning.