[turndown]

This is all well and good, but just because something came from before doesn’t mean it was a good idea then, or especially now. You’re basically citing survivorship bias. Of course something still used from the 80s is well made, otherwise it would have been replaced 30 years ago.

[epcoa]

Most of the networking stuff from the 80s at least wasn’t particularly well made, it’s just been maintained and significantly reworked to not have massive security vulnerabilities.

[fluoridation]

I don't think any of the networking stuff from the '80s dealt with security in any way. We're talking transport layer stuff.