This is just my opinion.
I would hold fire on getting a Thai tax ID number until you've been here 180 days (or whatever it is) starting from January 1st 2024. In theory, that is when you, become a Thai tax resident.....
You don't want to put yourself in the Thai taxation system if there ends up being no need.
Who knows what is going to happen over the next few months bearing in mind it has been reported in the Thai Enquirer that these new amendments are going to be contested.
Even there is only 1% chance that things will change again it is worth hanging on until the second half of the year just to see how everything unfolds.