I have no experience of Blazor, but the architecture of Blazor server is exactly what Phoenix LiveView (Elixir) does, and that works extremely well. Unless you

I have no experience of Blazor, but the architecture of Blazor server is exactly what Phoenix LiveView (Elixir) does, and that works extremely well. Unless your interactivity is at the level of Gmail or Google Docs, or you really care about designing for very high latency flakey connections then LiveView is great and works very reliably with a good user experience. Even on a phone with a cellular connection going through tunnels it's actually better than a lot of JS apps because it handles the reconnection (and visualisation) much more cleanly than most JS apps.