Even in “long standing tech companies with the best and most experienced employees” this sort of issue has been known to fall through the cracks. Twitter has experienced significant staffing changes, procedure changes, and code changes, recently and any one of those three things can exacerbate the chances of side-effects of changes not being realised until too late.
When you buy a company and your staff has had near complete turnover and your product significantly changes (at least in consumers eyes), are you actually the same company?
I'd say that shortly after Elon bought it twitter effectively became a start-up rather than an established company.
Arguing otherwise is like saying Xerox Park would have been the exact same institution even if all the staff were swapped with interns and management fundamentally change mission statements etc.....
