Very early on, WFH guidance world wide, no visitors to any offices, all interviews made 100% remote, all business travel cancelled, all offsites cancelled, specific offices closed based on high risk areas and/or people having/potentially having it.
They aren't meaningless, in fact in most companies there is specific defined meanings to them, and in some companies the definitions include the culture that is expected to be promoted by that level (team work, etc).
It allows you to grow in your career, have clear expectations around role and responsibilities.
Twitter uses what they call top grading, but really isn't, it's just a 1 hour reverse chronological set of questions through the most relevant/recent of your work history, asking the same set of defined questions for each role you had. Really just a structured way to understand your history in a consistent way. It basically the same as asking someone about their work history, but in a structured way.
It is absolutely definitely not the actual top grading of multi hours of interviews , phoning references etc.
The '1000' seems a bit silly and arbitrary tbh...