Right now wasp-app-runner does (pseudo code):

parallel([
  series([ clientBuild, clientStart ]),
  series([ serverBuild, serverStart ])
])

This leads to the client usually being ready much sooner than the server, and the Vite message with the URLs being scrolled out by the server build logs.

I think it'd be much better to do:

series([
  parallel([ clientBuild, serverBuild ]),
  parallel([ clientStart, serverStart ])
])

So both sides start more or less at the same time.