Steem tokens and scalability problem

Hi Steemers,
I'm asking myself how we will manage the problem of scalability with steem tokens when the critical mass of users will grow and will become difficult for our current protocol to reach the target of scalability needed to erogate a nice and quickly service to the final user. The solutions that I figured out, is an upgrade in the protocol or to use an external blockchain adoption. The first one would be the best cause we won't need a third party company to help us, but the con could be a long term investment and commitment that are not our core business, I think that our efforts should be put in the social network growth like quality contest and acquisition of new users in the short term instead of focusing on the scalability problem. The second solution, third party outsourcing would be nice but we have to really trust them to use their services and since now I don't think that cardano iota or eos are mature blockchain solution to be implemented in steem. What's your opinion about that? Am I wrong in some points, please correct me if I have missed something.
Thanks a lot for beeing part of this fantastic community.
Stefano