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
The scourge of fully soldered and non-upgradeable laptops - NotebookCheck.net News
Raspberry Pi 400 Gets an 8GB Upgrade — By Hand-Balling and Soldering a Donor RAM Chip - Hackster.io
Question - Upgrade soldered RAM and CPU | Tom's Hardware Forum