For now, it seems to be limited to Binance USD-accounts.
It applies to whatever exchanges are using Signature Bank as their SWIFT partner, and the move was initiated by the bank and not SWIFT.

So, this is not as universal as you (and I) may take it when reading the headline/blog post.
No, as SWIFT transfers are also handled by other banks.
Furthermore:
Only 0.01% of Binance's monthly users are served by Signature Bank.
Apparently Signature Bank had a $50k min. in place since 2016.
I'm not sure when the last time Armstrong was a credible source for... anything, but it was most likely over a decade ago.