Wasn't Elixir just created because 100%-Ruby-til-Death programmers refuse to learn any other non-ruby-like syntax? It's like their brains would shatter into a brillion pieces if they ever had to think about tail recursion.
have made the developer experience second to none
Except, LFE isn't a giant community and companies and organizations and conferences promoting its usage and building companies around it.
LFE is a nice project that grows as people use it without trying to form an army/cult around it like so many other languages do these days.
and, if you think 'cd' is a complex operation, your brain would explode at trying to start the LFE REPL for most of its life:
erl -noshell -noinput -s lfe_boot start