Employers can and do require a certain length of employment before initiating sponsorship.

Say that’s 12 months. If their I-40 is approved at 30 months, the employer can withdraw it for 180 days and the approval will be revoked.

So we’re talking 36 months until changing employers doesn’t set you back.

That is longer than the median FAANG tenure. That means you have an employee whose floor tenure is longer than the median.

And even then if at anytime the employee is fired (until they get their green card, which can take many many years), they have 60 days to find a new employer or leave the country.

silicon valley starts PERM from day1, lower tier firms require like couple years.

that's still absolutely normal regular tenure. You work for couple years, show your performance and convince your manager to initiate the perm process.

I have never ever seen anything even close to resembling the "servitude" conditions where tech workers are kept at one company against their will. Nobody is revoking your I-140, because you just transfer it when you change jobs.

re 60 days I agree, this is brutal and should be abolished. I believe H1B workers should be able to remain until the duration of their I-94 even without the job, to seek the new employment in case of job termination