People underestimate how few changes are needed to screw up a company.
Large US corpos see this all the time.
15 years ago, some freshly promoted lady making $60k/yr will have taken it upon herself to maintain some Excel 2003 sheet that is referenced multiple times per hour, by multiple divisions, and because everything is working correctly, no one has ever looked under the hood.
She dies or retires, things coast for a month or two, as the data errors stack up in the background before anyone notices anything and then one Friday afternoon, things go from wobbling to full collapse and no one can figure out why. Tens of millions of dollars in lost productivity, penalties, fines, interest and rework later, some $500k/yr consultant is brought in to rebuild and "modernize and optimize" a fucking spread sheet.
Cover is the 800lb gorilla in vtubing, but every time they lose an A-chan, they run the risk that the replacement is someone promoted above their ability level, that the person being replaced was filling duties that were either undocumented or poorly understood by leadership, or that the new person is just a nepo-hired shithead with personal baggage that is going to create an office politics nightmare.
Any of those have the potential to create a talent exodus tsunami on a super short timeline.