Pocket, for me, is a weird product/feature. I've tried to use it, but it ends up just being like a clumsy bookmarking feature.
Allegedly, you can read things offline, but that feature never works for me. It seems the feature for offline reading doesn't exist at all in Firefox (which I'd assumed was the point of its integration, but my assumption was wrong), and I've tried the Chrome desktop app and the Android mobile app
..nothing I save to pocket is ever readable without a data connection. It must work for some content for some people because I see people talking about it like it does. But, without that feature I see literally no utility in Pocket...it's just a clunky bolted-on bookmark manager, and so I end up going back to bookmarks with tags. I use Sync and I have Firefox on all of my devices. So, my bookmarks go with me.
So, I guess it's good that it's going open source. I wasn't comfortable with the way integration was presented back when they added it...it wasn't at all apparent, to me, that Pocket was a third party for-profit entity when the "setup your pocket" process launched in Firefox, since I'd never heard of it before that. But, it still seems like a solution looking for a problem. I'll give it another look. Maybe I was just unlucky with my choices of what to save...but it seems like if offline reading is not going to work on a page (for whatever reason) it should warn you. It'd suck to get on a train/plane or get lost in the woods, with plans to catch up on some reading, only to find there's nothing there.
But, maybe that's not even the primary purpose of Pocket? I dunno, it's still pretty fuzzy to me wtf it's for, if not that.