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Actually, solving the problem of scalability has been implemented using the LN network, which has a faster confirmation rate and lower cost.
Even the LN network is a network used by mass adopters, as happened in El Salvador.
But even so, the LN network is still full of pros and cons, and it is still in the development stage.
But we are still far from large scale adoption for the LN network. Actually we are very far from that. You may find users or groups users occasionally here and there, but the single button push setup would be needed similar to an app on the smartphone and people can instantly get going. Until now you still need a certain level of expertise to not get confused and to also set it up. And I think we would again observe a slope from the rich to the poor where the rich have more time and resources to invest into learning and running/using the LN network whereas the poor, who would like and need to benefit from micropayments, would tend to be overwhelmed by the terminology and resource requirements.
I am mentioning time as a resource because I know how careful I was when I first set up hardware wallets and stuff. It's the unknown that makes people be cautious and LN network sounds great, but it has to be as easy as placing an order on Amazon. Things should be taken care of from the first to the last step with minimum input from the user. I feel this is still a long way off.