I'll answer it literally: seeing what equipment other engineers use can give ideas for one's own serup. stapelberg is an effective engineer, so I'm glad he shared it.
It’s interesting because the author is a software artisan, like many of the people who are responding in this thread. Personally I love reading about the tools used by other people in the same trade. The choice of tools highly influences ones productivity, which is probably why I find it fascinating to read about his choices.
for me, it is the most interesting thing on the front page right now.