1. If your claim was that the net neutrality doomsayers from 2017 were correct, then your original comment of "[...] nobody has pulled the trigger yet, it’s fine" does a terrible way of conveying that. Any reasonable person reading that comment would interpret that as you conceding that the the doomsayers' predictions have failed to pass, but nonetheless refuse to admit the predictions were incorrect because it was only a matter of time before the predictions would become true.
2. "Net neutrality" is a term that doesn't have a precise meaning, and I'd rather not get into a fight about what it really means. That said, in the context of this discussion about the net neutrality fight in 2017, and whether the doomsayers' prediction came to pass, I think it's fair to compare to the pre-2017 net neutrality regime. In that context it's not clear whether "degrading video quality for mobile users" would be illegal. For instance "network management" was explicitly allowed, and only "pay for priority" would be banned[1]. Moreover there was a court case a few years before where FCC fought to prevent bittorrent being throttled, and lost the case on appeal.
[1] https://en.wikipedia.org/wiki/Net_neutrality_in_the_United_S...