I've heard this multiple times over the years. I offer an alternative explanation: I always have uBO enabled with a bunch of extra rulesets for curtailing tra

I've heard this multiple times over the years. I offer an alternative explanation: I always have uBO enabled with a bunch of extra rulesets for curtailing tracking and "annoyances". If I turn that off, I get weird behaviours in YouTube (and other sites). Re-enable it and I get back a smooth, reliable site. Facebook, eBay, newspaper websites, Amazon, et al all demonstrate similar behaviour: slownews and broken behaviour without uBO, performant and reliable with. Maybe it is coder bias unintentional or otherwise. Or maybe it's the ever-bloating workload of user-tracking and ads causing problems.