I'm currently playing around with server side Blazor and it works well. It's definitely not for general public applications but it seems great for internal corporate apps.

The issue that I have is since it is a thin-client re-deploys kick everyone off immediately. Where the web is totally stateless this is 100% state full. I'm used to being able to deploy production fixes rapidly without disturbing anyone's work but with Blazor server that's impossible. I've started to look into load-balancing solutions or something but not being able to roll out fixes throughout the day is almost a deal breaker for me.