Whilst I don't know many people who would be in your situation I do think that an offline, indexed data store could be very useful. Bookmarks even to this day are dreadfully implemented on all of the major browsers.
Bookmarks are obsolete and badly implemented for decades now.
Bookmarks are subject to link rot, having more than a hundred of them is a timesink nightmare to manage, bookmarks are useless when you are offline,... the list goes on and on and I have yet to see any browser even try to do something to address these.
These are UI complaints that can be addressed with a bit of investment and thought, but it's unfashionable work - Mozilla even tried to outsource it to Pocket, sorta...
> Bookmarks are subject to link rot
That can be fixed pretty easily: when the user bookmarks, submit a job to the Internet Archive, then use it whenever you get an error page from that link. FF already does half of it with the experimental no-404 extension. Alternatively, you can have your own InternetArchive-like service to do that, which is basically what services like Pocket and Pinboard do.
> having more than a hundred of them is a timesink nightmare to manage
You don't really have to manage them - these days they show up as soon as you type in the address bar. Ideally you'd have some sort of AI-powered categorisation system auto-filing them in dedicated folders, which could probably work with a bit of specialized meta tags. It's basically the age-old problem with filing documents of any type.
> bookmarks are useless when you are offline
Yeah well, a browser is also kinda useless when offline...
Bookmarks are subject to link rot, having more than a hundred of them is a timesink nightmare to manage, bookmarks are useless when you are offline,... the list goes on and on and I have yet to see any browser even try to do something to address these.