In my viewpoint (in the context of #BTC):
L2 is a protocol building upon Bitcoin's native security and decentralization, which resolves the missing piece for it to be a trifecta in the blockchain trilemma—scalability. 

Assessing the best solution is premature, with so many possibilities, it's a complete wonder; and It's simply an exciting time to witness the progress manifest.

What's your take on L2s Luke?