Ditching an architecture also directly implies adopting a new one. If juniors are at the forefront of that, I don’t think the resulting architecture will somehow get magically simpler.
Architecture is a topic to be debated, no doubt. But if anything, I’d expect the departure of senior talent to solidify complexity, not enable some magical escape from it. The risk of changing a system goes up significantly the moment the people who understand the system walk out the door.
Citation needed.
Google have just let Chris DiBona, Jeremy Allison, and Cat Allman go. I guess you might not consider those people critical to Google's mission, but laying them off is probably going to have an impact on Google's ability to recruit people from the open source community in the future.
What you’re describing doesn’t seem to match the recent layoffs we’ve witnessed.
I don't have hard numbers though, even layoffs.fyi doesn't have a great breakdown of who was affected by these layoffs by department. If anyone has hard numbers I'd love to be proven wrong.
This is different than what we’ve seen in some years past where layoffs seemed more about trimming dead weight.