X1 Extreme Expansion Opportunities - No Soldered RAM in this X1 - Every single X1 Extreme will accept 4TB NVMe + 64GB DDR4 RAM whenever you are ready regardless of what it
GPU RAM Upgrades Are Closer Than You Think | Hackaday
Why don't more laptops have upgradable RAM? | Ask an expert | PCWorld
Am I correct in assuming the RAM is soldered? : r/laptops
Memory in New $1099 iMac is Soldered and Not Upgradable - MacRumors