Apparently ~4000 new ones are issued to Canadians every year. Canadians have access to TN though which is way easier to get. I imagine everyone on a visa is strongly reconsidering any non-essential travel outside the US and giving the border guards an accompanying attempt to screw you.
I shudder to think what happens to the software developer job market up here if all the TN holders came back suddenly, if NAFTA were to be officially terminated in 2026 (as seems possible.)
Unless those people come back with venture capital funding in their pockets, salaries here will be even more screwed than they already are.