I didn't mention that on first occurrence of this I got Spectrum tech to come out and measure the signal -- all in tip top shape. That was when I first tried excluding the router from the test and connecting to my Linux desktop directly... which led to replacing the still new-ish router with the...
Oh, I've done that - see my original post. Nothing. There are some periodically activating processes (e.g. watchdog) but they do so well out of phase/frequency (i.e. uncorrelated) with the packet loss.
Anything at all - I ended up pinging the next hop as my litmus test because it was simpler. I originally started off diagnosing issues w/my work VPN and MyTraceroute was showing nearly identical loss on all hops. But to answer your question - yes, public DNS, public Web endpoints - all exhibit...
Looked at everything I could think of and am at my wits' end... This is what it looks like:
11:00 PM> 231........2..23............32............231...........23............33............32.22.........422..........
11:10 PM>...