If you redefine common terms as you go, you should at least give the reader a heads up. Nobody uses “big 4” for MBB and Accenture. Those are not the same type of companies.
The whole thread is debating who’s sitting in the BIG4 and all I see is companies trying to belong on musical chairs. What’s strangest to me is we’re not in an early-Schumpeter cycle, seats should be well-established by now, it’s been half a century.
It's like Deloitte consultants referring to MBBD.