For me my travel for work peaked when I was working in tech hardware -- I'd end up doing ~3 trips to Japan and ~4 to Europe each year from SFO (used to be a regular NZ1/2 flyer! Very sad to see that route go).

These days though it's all personal travel -- heading back to NZ to visit family twice a year is enough to keep my Elite (flying elsewhere I try and avoid United and instead fly Delta)