The original one (bourne) had a great number of limitations and yet as part of a standard it didn't see much change. Everyone wanted something better and each

The original one (bourne) had a great number of limitations and yet as part of a standard it didn't see much change. Everyone wanted something better and each person had an idea of what better was. bash became quite common because it's a superset and its' offered by GNU whose other tools made up for many other deficiencies in the various commercial UNIX implementations. Then FreeBSD and Linux made GNU stuff the default and that was a big boost. I tried fish couldn't really be bothered to persevere. A lot of the things I didn't like about bash were because I hadn't understood various bits and the more I know the more I find it fairly powerful and it has a kind of consistency. I don't love it but I found myself suddenly disempowered with things like fish.