Just take the dive into fish. It used to have a lot of problems with incompatibilities, but that's been less of a problem lately.

I haven't found nushell to be that great as a day-to-day shell simply because it integrates poorly with other Linux commands. But when it comes to data manipulation, it is simply amazing. I'm currently (slowly) working on a plugin to query LDAP. The ldapsearch command uses the LDIF format, which is hard to parse reliably. Producing nushell data structures that don't need fragile parsing would be a boon.