Well, I have been running automatic speed tests every 30 minutes for the past 5 hours (ever since the last time I power cycled), and everything seems to be working as expected. A minor drop once, but I was also using the Internet on a different machine throughout the day, so that could easily explain that.
I guess I'll just have to keep monitoring it and see if it is really degrading over time or if it is happening all at once. I assume it is over time because I've seen it at 20 Mbps, 15 Mbps, 10 Mbps, and even 2 Mbps. Unfortunately, I only ever notice when something starts buffering or seems particularly slow... and by that time it is already crawling.
https://testmy.net/quickstats/Flaid
I don't know, I may have fought them quite a bit about their "activation fee" when I first signed up. Since I had the equipment in hand, I wasn't sure why a tech needed to come out to the place and screw on the cable. They gave me a lot of mumbojumbo about checking to make sure the line hasn't been damaged by wildlife, etc, etc... When I asked to speak to the corporate office, they gave me $10 off. And maybe flagged my account for being snarky (?)