This is the comment that got me onto thinking: "how awesome would it be to have a software capable of decoupling the UI from the actual storage" so you wouldn't be tied to one vendor and do so by implementing a simple programming interface [2]

I did open source my solution [3] and have refined it over the year with plugins that implement storage for any storage you could think of like SFTP, S3, Samba, WebDAV and many more. Most of the money is coming from enterprise who need help to join authentication, authorisation and storage in 1 complete solution to do things like SAML based SSO on S3, 2FA layer on a samba server, audit capabilities, ....

The part i'm super proud of is it feel faster to browse Dropbox from my app than it is from Dropbox itself [4]

[1] https://news.ycombinator.com/item?id=8863

[2] https://github.com/mickael-kerjean/filestash/blob/a91df1637d...

[3] https://github.com/mickael-kerjean/filestash

[4] the technic that's used consist in caching the list of files/folder in indexDB and render the content of a folder with the data coming from indexDB first then refresh it with the new data essentially making a visit to an folder you've seen before be instant without any loading whatsoever. It's very simple but it seems nobody else is doing it