Definitely agree. Most developers could build a basic Twitter or Facebook clone. The hard part is getting the users, content, and relationships that make the product worth coming back to.
It is all the small things e.g.
YouTube Mobile website works really well when you have a inconsistent connection compared to the alternatives such as Odysee, Rumble, Kick and Twitch.
I can listen to a live stream or a video style podcast in the car and YouTube will resume the connection properly as long as the browser tab on my phone hasn't gone to sleep. Kick will just stop, if it is a replay it will resume from the start of the stream after rewinding the stream a few seconds while attempting playback.
While the code to do this isn't that difficult. YouTube has bothered to deal with the edge case of someone like me driving through an area with inconsistent connection while running their mobile site (not even their app).
Whenever people try to use alternatives, they often complain about poor reliability of the app. A lot of the clones are losing users and I doubt they really even know they are doing it.