Interesting article projecting some 2-3 years before Samsung 3GAE would really take off:
semianalysis.substack.com

Samsung Foundry 3nm Gate All Around Process Node, 3GAE, Delayed to 2024
Samsung Foundry 3nm Gate All Around Process Node, 3GAE, Delayed to 2024! This would arrive in a similar time frame to TSMC's denser 2nm GAA technology.Samsung and Intel continue to slip further behind TSMC in leading edge technology. Will they ever be able to catch up?
