I mean... a lot of your examples boil down to "With enough JS, we can smooth over the problems created by all the JS we added!" This approach is why Reddit is

I mean... a lot of your examples boil down to "With enough JS, we can smooth over the problems created by all the JS we added!" This approach is why Reddit is extremely janky on mobile, while HN is perfectly smooth. Opening a new page on Reddit takes up to 10 seconds; moving back to the previous page up to 5 seconds. Meanwhile, both are almost instant on HN.