Was hoping for the rumored 24 hours of battery life, but it looks like the M4 couldn't squeeze that. Still 18 hours stated, like the M3 Air:
https://www.apple.com/mac/compare/?modelList=MacBook-Air-M3,...
Looks like the only arguments for the M4 Air are:
- 32GB RAM option
- 2 more CPU cores
- 100GB/s vs 120GB/s memory bandwidth