For a lot of "usual" webdev, any reasonably modern language will do. Even modern JavaScript will be fine. Something like C# would have been way better, though, but we cannot change that now.

However... software development has become a mess of slow technologies and abstractions one on top of the other.

Some people are working routinely in a text editor that is behind three operating systems: the VM/hypervisor, the usual operating system (Windows/macOS/Linux) and then a browser instance (which is like a operating system now). Then add all the drivers, libraries, frameworks etc. that go in-between.

While I don't like that WebAssembly is yet another abstraction, at least it is a chance for a resurgence of system programming languages and to proper software engineering...