So a farang married to a thai only get 90 days...that's very little.And may be extended for another 90 days to 270 in total, at the discretion of your Immigration office.
The VE permit of 45 days (once implemented) may still only be extended for 30 days at a time*. 75 days max for most VE applicants.
*A VE entrant with a Thai spouse may apply for up to 90 days stay, with proof of marriage.
Some South American countries get 90 days on entry....boggles the mind.