This is the most common complaint I see for switching interactive shells to fish/nushell, but it's not a problem in practice. You don't ever uninstall bash, so if you've got a command to paste:

  bash <enter>

  <paste> <enter>

  exit <enter>

Tada!

Exactly this, couldn't be easier. Heck, I run into this all the time on macOS whenever an LLM gives me a Bash one-liner that for some reason doesn't work with ZSH. It's easier to just pop into Bash than analyze and adapt that command line to ZSH.

> couldn't be easier

Except for the single step workflow: <paste> <enter> like you do on POSIX shells?

Couldn’t be easier to use another shell. As in: it’s hard to imagine making it even less complex. Which means it’s no burden at all.

Do you get it now?