tldr; Ethereum merge is on track to happen as early as mid-September, if everything goes right. Layer-2 solutions will play an important role in the new Ethereum ecosystem. The more efficient the base layer is, that much more efficient L2 applications will become. L2 solutions typically come in 2 forms: sidechains and roll-ups.
This summary is auto generated by a bot and not meant to replace reading the original article. As always, DYOR.