The original comment about Dropbox was saying how everyone can "trivially" implement Dropbox using a network share and hence it has no reason to exist - but obviously this is wrong.
Many HN commenters are now saying how they won't ever buy anything from Meta. That's fair, but brand perceptions shift - newer generations are already at a point where they are way more comfortable sharing their lives and branding themselves than before - wanting to be a YouTuber now is what wanting to be an astronaut was in the past. A lot of the reputational damage dealt to Meta is US-centric (e.g. Cambridge Analytica), and the HN crowd, being mostly Western and privacy-aware amplifies that. The average person who's using Meta's services doesn't read HN, and is certainly much less critical of Meta.
Also, I think AR glasses has lots of potential as an eventual phone replacement. I'll give an example - virtual humans that exist in your glasses that can act as a fitness trainer, tennis coach, rock bouldering buddy that you can summon anytime. I think we are kind of all glued to the same pane of glass for too long and give it 5-10 years for the pendulum to swing, this blending of physical and virtual will become very interesting.