I think the problem of Bitcoin scalability is already been handled although the approach to it's adoption is a bit low since its implementation but I think with times adoption will drastically grow in mass and by this I mean the Bitcoin lightning network which was a resolution method to solve the problem of Bitcoin scalability.
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To overcome the scalability problem Bitcoin is already available with the Bitcoin Lightning Network which provides transaction speed, low fees, and is more efficient.
But behind it all the Lightning Network is still in the development stage and several dilemmas about the difficulty of developing the Lightning network must make Antoine Riard resign from the development of the Lightning Network, citing security issues and fundamental challenges to the Bitcoin ecosystem.
This is a difficult dilemma and makes the role of the Lightning Network fade.
Antoine Riard said that he wanted to focus on developing Bitcoin Core.
But in my opinion, even though the development of the Bitcoin Lightning Network is quite difficult, there will definitely be a solution to overcome it.
Bitcoin developers are not only Antonie but there are still many who can do it well.
technology can still continue to be developed and there will be a solution later.
Source:
https://cointelegraph.com/news/bitcoin-core-developer-antoine-riard-steps-back-lightning-network-dilemma