Specifically, do you worry that Microsoft is going to eventually do the Microsoft thing and horribly fuck it up for everyone? I've really grown to appreciate the language itself, but I'm wary of it getting too ingrained at work only to have the rug pulled out from under us when it's become hard to back out.
Edit: not really "pulling the rug", but, you know, doing the Microsoft classic.
Well since this is a Typescript / Microsoft kinda thread - there are replacements.. You can use C# with Blazor (from Microsoft)
And you can also compile Go and Rust to WASM (probably some other stuff as well that I'm not aware of)