(Edit: wrong person, here's video of what I'm remembering: https://mobile.twitter.com/townhallcom/status/14733056927149... ) (Anyway that was just intended as context for below, what I think may have been the starting point for a larger shift)

Thing is, the virus didn't change size, so right after this it's as if people started to realize the droplets-vs-aerosols mistake from 2020 that a minority have kept on since then, and what they've been saying for over a year is slowly becoming accepted:

Masks and social distancing were mandated under the assumption SARS-CoV-2 spread primarily through heavy droplets that would quickly fall to the ground, which were also large and heavy enough to easily be caught by masks. However, it turns out the primary spread vector is aerosol - too small for cloth masks to catch, light enough to quickly diffuse through a room, and light enough to easily slip around the sides of an unsealed mask.

A well-sealed N95 might work, but considering how bad even pro-mask people are at wearing cloth masks correctly, I don't think very many would manage to wear the N95 right.