Language · 2019–now · Platform Wars
Gleam
Erlang semantics with friendly syntax on the BEAM. The language your functional meetup loves and your employer has never heard of.
Why Gleam stuck
Gleam stuck in admiration because the BEAM model is genuinely excellent and Gleam finally makes it readable. Adoption lags because Elixir already owns the "modern BEAM" slot and hiring pools follow incumbents. You do not rewrite a telecom core in a language with twelve production users.

Compare with
Related
Language · 1986–now
Erlang / OTP
Let it crash, supervision trees, and nine-nines uptime. The telecom substrate that outlived every "modern" backend pitch.
Language · 2011–now
Elixir
BEAM reliability with modern syntax. Phoenix and LiveView keep the torch for pragmatic functional web.
Framework · 2014–now
Phoenix / LiveView
Real-time Elixir on the BEAM with HTML-over-the-wire before it was cool. Small but fiercely loyal community.