Are companies willing to sponsor an H1B visa for L1 holders to support a company transfer?
They do, but at most companies it’s something you have to nudge the manager every year and not automatic.
Why is that? Is it because of the uncertainty of the H1B lottery?
Because it cost them money to file an H1b. Especially after you’ve been with them, they know it’s impossible for you to leave anyway.
Yes. They do.