I like Elvish. It's clean, consistent and stable. Writing a shell script in Elvish is so much more productive and simpler than, say, bash. There are are also fewer pitfalls and tricks you need to master.

The Elvish shell language doesn't change much which is nice nowadays. The Elvish executable has also got a built-in lsp which is another nice touch.

Finally it is a "proper" shell because it has job control (which other new age shells like nushell don't).

P.S. I like nushell too which has got more features, is more powerful but is still evolving. Maybe in a couple of more years it will stablize like Elvish already has. There are lots of similarities between Nushell and Elvish scripting language. I would recommend either of them.