My wife and I are there after about 20 years of both working engineering services for large chemical companies. So our 401K is definitely a problem I guess....~$1M net worth puts you in the top 10%. ($970k actually, according to Kiplingers - that might be 2022 data)
I am sure that seems like a lot to the youngsters here, but also 100% certain there are quite a few older CF'ers here that would meet that criteria, whether it's 401k, farmground, or whatever.