Lightning networks to handle scaling limitations are the first step on the slow re-centralization of bitcoin. Eventually an overwhelming majority mining will be controlled by a centralized/federated oligopoly.
Be prepared to rebel and re-re-decentralize in 20 years.
Personally I'm much more bullish on Bitcoin Cash. It's following the same path that got us to this point today, and they're not opposed to Layer 2. But they have a clear understanding that a currency is only as good as it's utility. If they can maintain that balance of decentralization, utility, and security, while picking up the pieces that Bitcoin Core dropped it's likely we'll see a flippening in the coming year.
It's a different kind of centralization, if you can call it that at all, since you don't have to trust your counterparty in a lightning network style payment channel
Even viewing it more generically, the same scaling issues apply, and the same inevitable re-decentralization awaits it. Centralized systems trade robustness for efficiency. The drive to lower costs will always result in re-centralization.
