@nuintari @josh I was being a bit obnoxious and hyperbolic, but I have had dozens of times where something (a connection, a website, a service, some kind of traffic) would just stop working. Packets just never getting a response or never reaching the target at all.

I can't say if this was my ISP, as I've had a few, or some intermediary, or some kernel bug, or what, but it happens with every single machine or server I have set up in the last 20 year. "I forgot to disable ipv6" has moved up into the top five things I suspect as problems whenever connections stop working randomly, and dping so keeps making things work again, so I keep doing it. I've never spent much time trying to get to the bottom of it, because I just need things to work, and as a result, yeah I blame the protocol now, fairly or unfairly.