true, but big companies will usually take care of visa issues if you're hired full-time (or join as a summer intern and convert to full time). yes, it's hard to

true, but big companies will usually take care of visa issues if you're hired full-time (or join as a summer intern and convert to full time). yes, it's hard to quit to join a startup; but those foreign students would've had a hard time joining a U.S. startup even without a Ph.D. due to visa issues.