It's not going to take 2 years...

New vulnerabilities are found on a daily to weekly basis.

To put this in perspective. In 2024 there were 1360 vulnerabilities reported, 587 confirmed with 33 deemed critical.

I would hazard there are critical vulnerabilities that are right now being worked on, or are complete but unreleased. There was a concern of the exploit being patched. That concern is gone for millions of PC(s).