It's so incredibly brilliant that it spoils me for mainstream tech, but it's never actually "done enough" for mgmt to feel comfortable adopting it in any capacity. (See also: Unison https://www.unison-lang.org/)
Or, you can get them to adopt, but then you hit hiring limitations.
I say this as someone who built a large team of Clojure developers in a Fortune 100 company, and lived to regret it.
Depends on how flexible your "hiring principles" are. You mention you did this at a Fortune 100 company, so obviously you didn't have any flexibility at all. But for the (good) places that allow people to learn on the job, you just need to find a sufficiently smart person who likes to learn, and they'll get up to speed with Clojure relatively quickly, as long as their first reaction when seeing parenthesis isn't "eww".
Things really are, and can be that simple. Rich has some talks that should be required viewing for all programmers.
Turns out that I miss all the conveniences whenever I'm not using a lisp-like.
Agree with the challenges you mentioned using new tech at a more mainstream company.