Why is Layer 2 more important than Ethereum 2.0 at this stage? (www.blockcast.cc)

(1) Layer 2 can land quickly.

(2) Ethereum 2.0 will also focus on Layer 2 technology.

Challenge 1

Challenge 2

Advantage:

Challenge 1

Challenge 2

Advantage 1

Advantage 2

Why does Ethereum urgently need to expand?

Plasma, the first generation expansion technology

Rollup, the second-generation expansion technology