Just as a heads up, you'll be downvoted, not because you're mentioning latency, but because your comment is low effort and basically complaining about discussions in a place where discussions are kind of the point.
Is there any new information about latency since before that you want to expand on?
But it's more interesting if we discuss the latency itself, rather than complaining about previous discussions around the latency.
As it seems right now, the latency is more than alright, at least for people who are used to really shitty latency. Sure, it's not gonna replace your home connection if you live in-or-near a city, but for the rest of us, it's much better than what was offered before.
Which is exactly why he isn't advocating plain javascript. You should take a look at micro-frameworks like Intercooler (and htmx, unpoly alpinejs etc). For devs who don't remember the days before megaframeworks it can be quite illuminating to see a different way of looking at things.
Whatever.