Some thoughts so far: Installing gleam installed about 50 packages on my system (possibly all erlang/elixir related). But what if I just wanted to transpile to js? Perhaps this is a packaging issue on my system though.
What I really wish is that Lua would be considered as another transpilation target. I think gleam could shine for DSLs in other programs but embedding Lua is 3x easier than embedding a js runtime imo.
In general, I find the nicest thing so far the community. And I want to say that the quality of libraries and resources in the gleam community seems exceptionally high. It reminds me of the rust community insofar as that for most hard problems someone smarter than me has already worked on it and published a good solution (e.g. lustre, squirrel). Then I would say you can also expect a lot of creativity and experimentation, the things that may fly under the radar in larger language ecosystems stand out here due to the growing and welcoming community.