> On the consumer side, storage will become an appliance, like a (stick of butter sized) fridge. Or just included in your centralized home + family control center.

You can already get an inexpensive Synology NAS with a slick UI and backups to a cloud provider of your choice, or Nextcloud, although there's probably room on both for one click import from your existing Dropbox account using your auth and their API to migrate contents.

This is not backed up by anything besides your opinion. The main chart you should look at is the increase in number of paying customers month after month.

Dropbox is much more than just storage. They also have their own infrastructure and don't depend on GAFA. They made a decision to not compete on the consumer side. I didn't like it but you cannot blame them given the large pockets of the competition and the fact they can monetize those costumers with their other products unlike Dropbox. They compete in enterprise where price is not the main factor like it's for consumers and doing it successfully.

I will ping you in 5 years... (they might indeed get acquired though. If that happens it's gonna be for at least double of what $dbx is worth today)

It makes no sense not to compete on the consumer side. The enterprise side has enormous barriers to entry, like a long sales cycle, RFPs, security audits etc. Office 365 simply offers more, plus with a familiar interface that doesn't require extra training for end-users.

Who is going to be championing Dropbox on the enterprise buyer's side? Employees that are satisfied consumers or the IT office that uses the same 4-5 vendors for everything?

I don't say you're right or wrong, cause I don't know. All I can say is that you cannot say "makes no sense" because it's been working OK for them so far. They have ~15M paying users and the number keeps growing (not at a very high pace but still steady growth). Their revenue is growing at a higher pace than expenses. Enterprise sales is not easy but they have been doing it for a while now. They also expand their product line to be a more complete solution for team productivity and collaboration. They have been doing a lot of mistakes on the way. They launched many products that failed. Their vision was lacking. But overall their numbers show it's a healthy company moving in the right direction. It's just not been growing in the pace everyone was thinking they would after their IPO.