[supergarfield]

This is not really true: the main limiting factor with H1-B visas is the yearly cap; as others have said, the rest of the requirements are normally easy to check off (especially if you already have an H1-B).

Since you are not subject to the H1-B cap when reapplying if you are already on an H1-B, and since there is so much demand for tech jobs, it's not clear that H1-B tech workers have to be loyal to their employer.

[dominotw]

you have to be loyal once you apply for your green card. most ppl on h1b don't want to leave after 6 yrs so they apply for their greencards.