I wonder why adding another incompatible syntax layer on top of the already inconsistent syntax would really help here. Backticks exist since ages. What do you gain by more syntactic sugar?
Backticks exists in unix-shells aswell but the gain is that you can nest things with the $(command) syntax. Now you sometimes need to break things up on multiple lines to obtain the same result. I don't think the exact same bash-like syntax would be necessary but I would really like the ability to nest commands if possible!
Something like:
Echo "$(dir $(cd))"
Which is a very bad and useless example but I just tried to come up with something quickly

Ehem. Which shell have you been using the last decade? Go, upgrade your shell to V45, it's in the Aminet. Yes,of course it supports multiple backticks on a line. (-:
Well, the default 3.1 shell mostly and the 3.9 one on one computer :O I have never updated my shell but I certainly need to do that now

Happy to hear that is already in there!