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
Case Study | Soldered Onboard SSD Data Recovery from Macbook
16GB to 32GB Soldered RAM Upgrade - 2018 MacBook Pro 15-inch - 4K - YouTube