“The engineers did a better job building a resilient system than we expected” speaks well for the fired folks, but doesn’t preclude it eventually hitting a point where that resiliency runs out.

It rather speaks well for the original engineers who laid out the foundation. It might be a totally different set of people than these in 2022, fired or not TLDR: Twitter is old.

I would interpret that part as "original twitter architecture was actually well done and resilient" then anything else. It just means that many of those systems were better done originally then legend had it.

The severe and immediate loss of advertising however was not just a minor messed up part of the takeover. The money making parts of business is something that does matter.