Is Blazor still "experimental"? I looked at it a year ago I believe and most people didn't seem to recommend it at that time due to not being optimized.
Sadly Microsoft is still terrible with naming developer products. There are 2 Blazors, the server-side blazor (which works like Phoenix LiveView, and then there's the version of Blazor that will target WebAssembly and run completely client-side.) The WebAssembly 'version' of Blazor is still experimental. Server-side Blazor is production-ready as far as Microsoft is concerned (I believe.)
Using Blazor Server in production right now. Like another commenter said, there is also a client side web assembly target as well. The Server framework is great, but has its issues which I mention elsewhere in the thread.