While I can't truly say that Steem has replaced my other social media habits (because I quit FB ages ago, don't really use Twitter or Instagram, and don't read Medium) -- it has largely supplanted my main 'time-killer' of browsing Reddit. I wish dTube had content that was as interesting as what you can find on YouTube -- but I would imagine that it's on the way -- things are just very "crypto enthustiast" oriented right now, I've found.
I would imagine that, once word gets out a bit further, and it's easier to get onboarded, as you say, things will start improving / evolving even faster.
At the very least, it's giving me time to work on developing my Steem app before there's lots of eyes seeing how sloppy it is (or isn't -- everything is subjective).
At some point, there will be a similar site here too I'd predict.
It is the age of the scene, it is still very young and specialized.
It is a very good breeding ground for devs and apps I think
Agreed -- Steem is currently in the space of "Rapid Prototyping" I'd say... Hopefully it leads to something polished and useful -- I'd say many projects are on their way.
Hoping there are some exciting developments and updates with scalable and affordable nodes from SteemitInc in the near future.