Yes and no. The ultimate goal for many H1Bs is the green card - and after your application is in your mobility is severely restricted. The nature of the countr

Yes and no. The ultimate goal for many H1Bs is the green card - and after your application is in your mobility is severely restricted. The nature of the country-based priority dates means that Chinese and Indian nationals wait years for the green card application is approved, during which time they (mostly) cannot move. So if you're strictly on a H1B, yes, it's trivial to switch jobs. If you have a green card application in-process and aren't from China, India, or the Philippines, it's also pretty easy to move (you might have to wait a few months for the right moment). For people from the above three countries it's just pain and misery.