What you say is fair. It seems that OCaml's niche with time moved from competing with C to competing with Haskell and Rust -- at least from where I am standing. Maybe some members of the community aren't OK with that goalpost moving. That would be understandable.
But to be fair, I like OCaml more than Rust but I got very spoiled by both Elixir's and Rust's tooling -- both are excellent enablers of productivity.
Once OCaml overcomes this barrier (and introduces multicore) I am definitely going in, neck deep! :)