M1 Mac RAM and storage can be upgraded after purchase, but it's not easy - 9to5Mac
Memory in New $1099 iMac is Soldered and Not Upgradable - MacRumors
M1 Mac RAM and SSD Upgrades Found to Be Possible After Purchase - MacRumors
Ujjwal Arora on Twitter: "Will the 8Gb non-upgradable RAM be enough when Windows 11 hits?… "
The New 21.5-Inch iMac Is Completely Non-Upgradable
Dell XPS 13 9310 2-in-1 gets refreshed to include Intel Tiger Lake, Xe graphics, Evo, and Thunderbolt 4, but RAM and storage continue to be non- upgradeable - NotebookCheck.net News