Yep. There was an assumption 20 years ago when common switches were 100Mbps and running cat5e that you’d have to upgrade cable to get the next speed tier, 1Gbps.
It propagated wildly, but was always incorrect. Cat5e was very much capable of gigabit Ethernet by design.
It was only beyond gig that you’d need cat6, and even then at short lengths 2.5/5/10Gbe has a good chance of working on cat5e anyway (but don’t do it).
Great… Signal is imperfect.
Can you suggest a perfect alternative?
At this point I’m just happy my family have tolerated it to the point we’re not using Facebook Messenger, Google chat (it whatever it’s called this month) and WhatsApp.
The xmpp or whatever other convoluted alternative you’re about to recommend is not something I’m going to get 20 or 30 family and friends to switch to.
Signal is imperfect… But not as bad as many other options.