Canada on the other hand gives you PR on entry if you're skilled enough.
Money doesn't matter if it becomes an eternal struggle or impossible to maintain legal status.
#1 could change, some tech companies have started to realize they can offer more remote jobs and save money while offering salaries that are still very competitive to anyone not living in the Bay Area. #2 was already problematic before Trump. #3 is often better outside the US.
[0] https://www.theglobeandmail.com/world/us-politics/article-tr...
I have no specific knowledge of the wording of the treaty, but it seems highly likely that the leader of any of the 3 countries could suspend the visa.
A cousin of mine used to do staffing for highly specialized roles in the auto industry and the TN was very important in the Detroit/Windsor metro area. I don't think it is used in tech anywhere near as much as it is used elsewhere; since it is clear that the current administration is just looking for ways to give the tech industry a hard time, it seems unlikely that TN would be a target.
On the other hand, the method for getting a TN visa is very much different than other visas. A Mexican citizen coming into the US has a fair amount of advanced paperwork required but otherwise has almost no problem. A Canadian citizen just shows up at the border with a job offer, a detailed description of the job and proof of the education requirements. The immigration officer makes the determination on the spot and they either walk through or turn around! The administration could quietly issue guidance to immigration officers about how strict they need to be, and you might end up with very similar effects without all the publicity of an executive order.
[1]https://www.theweek.in/news/world/2020/06/22/american-dream-...
So it seems plausible -- but these aren't people cynically exploiting Canada as a hop on the way to the US, they're people who were born outside Canada but moved to Canada as children and grew up Canadian.
Is that my post or my parent's post? Fwiw I'm well aware of Canada's property bubble but I'm sure that has more to do with foreign capital outflows than local talent being pushed out the market.
Canada has already been benefiting from the recent restrictions on work visas and rejecting visas for no reason, for example by saying a forensic pathologist isn't a specialty occupation.
https://www.npr.org/2020/01/27/799402801/canada-wins-u-s-los...
https://insights.dice.com/2020/02/11/canada-continues-benefi...