I would explain it with sampling bias.

Take 100 people, and suppose 1 of them decides to stop using Gmail, replacing it with a custom setup. 99 decide to stick with Gmail. The 1 person who spent hours on a custom setup is more likely to leave a comment sharing their experience, tips and tricks, etc. The 99 won't have something noteworthy to post about.

End result is you see disproportionally more comments from people who do something drastic and unusual compared to ones who don't.