Even my own systems at home are burgeoning under the load of the my more ambitious hobby projects I'm doing for fun. I don't envy "we had to build five more datacenters to keep up with demand" class problems just from a how many people have to sign off on them perspective let alone the technical difficulty of doing so
For like 10 years the only feature development they did was by stealing ideas from GitLab. I wouldn't be shocked if little if none engineering discipline has took place at all during this time if it's this brittle to frequent change.
Guessing it was mostly held together with duct tape and poorly written tests/monitoring systems if any other corporate driven software.
We're really going to find out over the next few years which businesses have good practices or not.
Why do we keep giving excuses to poor engineering disciplines + poor management? This problem is entirely GitHub's making and acting like it's some unplanned natural disaster is low key pathetic.