As I understand it, blazor really needs WasmGC in order to have good performance and small bundle sizes. Otherwise, blazor is forced to ship a GC inside the wasm bundle - and that adds a lot of weight. And it also makes it more complex to share C# objects with javascript.

WasmGC is supported in all browsers + nodejs now, but its still pretty new. Safari only started shipping it in December last year. I'm not sure if wasmgc is the default build for blazor, or what the status is on it.

Blazor should be able to be good, small and fast. (Maybe even smaller than rust web frameworks.) But I don't know if we're there yet.