To be honest, I think 8 GB is a more realistic requirement for light tasks nowadays, but not because of Windows - even Windows 10 would struggle with Chrome, Word, Excel, etc on just 4 GB, and I can't imagine that W11 is any better. Increasing the requirements would ensure that OEMs won't put Windows 12 on shitbox PCs with 4 GB and call them usable, just because they meet the bare-minimum standards.