You are still conflating legal status and visa in an improper way.
The I94 expiration case can happen in practice. I don't know all possible cases, but at least for H1B done through change of status, you are not required to get a visa as long as you do not leave the country. And no, you r I-94 does not expire for three years, so it is entirely possible to complete a whole H1B period without a visa.
The I94 expiration case can happen in practice. I don't know all possible cases, but at least for H1B done through change of status, you are not required to get a visa as long as you do not leave the country. And no, you r I-94 does not expire for three years, so it is entirely possible to complete a whole H1B period without a visa.