> 1. VWP/ESTA is not terribly different from some other systems, like Australia's ETA, in using the "you don't need a visa, but you do need to check your eligibility online in advance" approach.
Relevant to this thread, it's also quite similar to Canada's eTA, which became mandatory for everyone arriving by air, except Canadian and U.S. passport holders, in November 2016.
Relevant to this thread, it's also quite similar to Canada's eTA, which became mandatory for everyone arriving by air, except Canadian and U.S. passport holders, in November 2016.