Rates of climb or descent in excess of 1,000 fpm or more during the last 1,000feet before assigned altitude/flight level either in the climb or descent was a mandatory SAFETY call from the PNF when I joined Laker at the end of 1978.
Needless to say, this was long before TCAS had even been invented.
Surely the 1,000 fpm safety call is still normal SOP?
It certainly was in every company that I ever worked for.