> These systems aren't "survivors" - they're held together with a fragile weave of scripts, hacks, unsupported hardware and outdated knowledge.

It can be, depending on the system and who's complaining about it. Sometimes a fragile, buggy, mess of a legacy system is actually fragile and buggy, with failures causing downtime or lost business, and creaky processes slowing new development to a crawl. Sometimes it's just a system that has an unfamiliar or slightly less ergonomic developer experience, that uses older technologies that some developers don't want to learn. You have to look past the complaints and judge for yourself.