Comment by HeavenFox
8 hours ago
You are talking about change (or extension) of status, not visa.
US is unique in that the visa sticker and your right to remain in the country (status) are two different things. The only purpose of the visa sticker is to allow you to travel to a U.S. port of entry, where you apply for admission, and therefore legal status. You can have legal status in the U.S. while the visa sticker has expired, and your status can be changed or extended domestically. However unless you have a valid sticker you cannot leave and return.
It's not unique: Japanese system is exactly as you described.
Australia too - however, to get a renewal all you need is an online connection and a credit card, the renewal (at least for me!) goes through automatically. (Notwithstanding that Australia just increased the PR-renewal cost from ~400-500 to ~1400-1500 AUD)
There actually is a pilot to renew h1-b visa foils while in the US without a consular appointment.