Take a random Linux binary which does anything non-trivial (has a GUI, does system monitoring, etc.), try running it on a different distribution from 3 years earlier without a packaging system, and tell me how it goes.
I can tell you that old Linux binaries run just fine on current distros.
Looking at how many times you repeated your misunderstanding in this thread it's clear that, not only do you not understand the solution, you don't understand the problem either.
Simple: I don't believe you. Grab this copy of Firefox from 2022, https://www.firefox.com/en-US/firefox/96.0/releasenotes/, and run it on a modern distribution in 2026. If you fail, my point is made.
Why specifically FF? Software without TLS does run just fine 5 years later on 5 year newer distros.
The page didn't include a download link, so I found it here: https://ftp.mozilla.org/pub/firefox/releases/96.0/linux-x86_...
And yes, it runs perfectly fine on Debian 13.
You aren't going to convince him because he doesn't know what the problem is.