with tourists visas yes you can. Long stay visas like ED, retirement, marriage etc is a different story. Tourist visa is only considered “live” when you have a active entry….
you simply exit Thailand and get a exit stamp = no active entry. You can now re-enter under a different visa to activate entry under said visa.
Other visas can be different and a “change of stay purpose “ may need to be submitted. Especially if not leaving the country. But thats for long stay visas, not multiple entry tourist type visas
nope lol. Can we please stop this fear mongering now? As with most western countries, AU has a double tax agreement with Thailand. If you tax on it in AU, you don't tax on it in TH. These new tax enforcement has zero impact on 99% of foreigners.
obviously internet speed matters when you work remotely. And unstable internet is a thing in SE Asia. (Not in Thailand though). Nothing remotely funny about that