Lack of response and direct human interaction is why I never pivoted to doing "online" sessions, podcasting or even online-first training sessions.

As well - the fact that technical writing (in publishing at least) has been homogenized and steered-clear of the use of humour, metaphors, idioms and analogies has also moved me away from writing/technical editing - I miss the days of "quirky" books - things like Jeff Duntemman's "Delphi Programming Explorer", which IIRC was told as a hardboiled detective mystery. Or "The Phoenix Project" by Gene Kim, Kevin Behr, and George Spafford. Sure - I understand the driving commercial underlying reasons for this: profit + globalization - but I still miss those. Of course, with technical blogs available, there are still plenty of unique voices out there.