You and I aren't the real customers of the artists that built this page, the people paying their consulting fees are.
I have yet to see any web page scrolling animation that is smooth doesn't cause Jank. And it is very bad experience. I remember the Trash Can Mac Pro website had that website design , and I cant imagine any Pro actually like that. ( And the current AirPod website as well )
These low frame rate animation actually cause me headache and making me throw up.
On a more general note, I totally agree with you: scroll hijacking is a real issue and very very few people actually take care to implement it correctly. The New Yorker is one of the few who usually get it right in their interactive stories.
So not this one.
Also you can't basically skim through the page / infos as everything is oversized and all over the place.
Eventually I closed the page without knowing much about the phone (I noticed the lack of jack plug though).