Because things change. New ideas appear and older cable standards are reviewed to see if they can be used for the new idea. So check the date on technology information; if not dated assume it WAS correct and we now know more.
It doesn't mean the source was wrong when written.
That is true, but not sure how Cat 5E or any Ethernet cable can change, maybe made with better materials. The technology is still the same as it was.
Maybe I am looking at this wrong.
The best way is to suck it and see. As I said if this was my house I would put fibre in the walls and under the floors and have fibre sockets. Not because i need it, but because it is the way to go.
One reason why my partner did it, she decided it was the best way to go, even if a bit pricy.
Adrian
Desktop machines Mac mini pro with macOS Ventura, also pc Ryzen powered with windows something or other.
Zooming with Zzoomm FTTP,