No like the post mentions you need to target a libc your users have on their system, which they show is best handled by linking to one that's a decade plus old

No like the post mentions you need to target a libc your users have on their system, which they show is best handled by linking to one that's a decade plus old (as a least common denominator most likely to be available). If that sounds silly... then ship your libc and everything you depend on in a flatpak or similar contained system image.