Think about the difference between Reddit and Lemmy. They both offer similar functionality, but Reddit will set your phone on fire if it gets the chance.
The same is true for YouTube. Browsing YouTube is scrolling through an image gallery, only video playback should be a problem. Yet, it will consume more resources than a well equipped laptop had when YouTube was launched. That’s insane.
We’re moving in a direction where computers get faster and faster, but for the last 10 years or so, the actual utility of the system as a whole stagnated. Besides games, what can a modern computer do, that a 2014 model couldn’t?