Earlier quoted context omitted.
From my experience, none. "Utterly unfortunately, today was your last day with the company. A separation agreement has been sent to your personal email. Your corporate access is being revoked. Thank you for your contribution!" Being fired for poor performance is all about ample warnings, issuing a PIP, etc. The company wants the employee back on track. Being laid off is a situation that an employee cannot fix with th…
"Employees might sabotage stuff" is something parroted constantly and there's never any proof it is a significant issue.
Early in my career in the mid 2000s, the startup that was on the same floor as mine laid off a QA person, who then showed up the next day and fatally shot the CEO and head of HR. Our CEO called me and told me not to come in that day.