“I would expect to start seeing significant public-facing problems with the technology within six months,” he says. “And I feel like that’s a generous estimate.” https://www.technologyreview.com/2022/11/08/1062886/heres-ho...
But there's one more gotcha, a company can't just keep 10% - 40% and expect the service to still run, because it's rotating and oncalls can always reach out to other people on the team.
Twitter not only fired indiscriminately, with perverse pattern (more capable to find another job leave first), and didn't even keep the minimum to keep the lights on.
From a software engineering perspective, it's doomed to fail, maybe it can retract to a smaller footprint (abandoning features/stacks) and still work, but that would also be pretty hard. That, and I don't think anyone not desperate will apply for a job there in the foreseeable future.