I wondered the same thing. Like, if it would be an issue to apply for the DTV (especially for remote working) after holding a previous visa. To me, I’d think that would be a problem if people were in Thailand on let’s say an education visa for a year, then apply for the DTV and show 6 months of work history/bank statements…it will show that the person was previously working remotely while on another visa. But, I guess that would be the same issue for a tourist visa…and it seems people are still getting the DTV, so, maybe it is fine.