Mind the selection bias. People that went through layoffs, bounced back, are reading HN and decide to publicly share with you their experience are not necessarily representative.
Also take into account ageism in IT. Recently had a video call with an older engineer from SV that's smarter than me which confirmed you can be up to date with the latest tech but once you go through the door (after having scrubbed the CV of any obvious age give-away references) and they see you could be their father it's game over. And this for a contractor position where they can fire you the next day! He was seriously considering retiring for the lack of jobs and not for the lack of skills / work power; also thinking about moving to cheaper locations.
Layoffs push people out of the industry and even work force entirely.
That being said, this post will have some good psychological impact for some.