which ones wont issue a driving license ?? Obtaining a residence cert can be difficult in some provinces, in which case you can fall back on getting an embassy letter, but all provinces should issue 2 year licenses to all visa classes.
The 5 year license is a different story, not all offices issue those on a DTV.
you pay taxes on funds you remit to the kingdom any year you live here over 180 days..
Tax residency has no bearing on where your income source is.. It is also entirely possible to be tax resident in Thailand, and not in your home or passport country, while paying zero tax. I do and have done for years.
I am a cross border tax specialist.. Thailands loopholes are a large reason I am here.
Which of the 60ish DTAs are you even talking about ?
And as someone who deals with EU/UK/(rarely)USA DTAs on a daily basis, I can says between those ones, and the OECD standard, that is categorically not true.
One country may retain sole or primary taxation rights, but taxation rights does not preclude dual filing.