I am very much a generalist and this comment checks a lot of boxes for me. If you find yourself pigeonholed into some niche (which can be super profitable), and that niche disappears, you're not really left with much to work with other than a complete career change.
this is a factor for me. I've always had to pick up new languages frameworks and skills on-the-job. but today hirers are seeking only really niched down specific experts, and i suspect i am filtered out automatically by not matching that, with no regard to the fact that it's not that big of a deal for an experienced engineer to pick up something new