RAM prices soar, but popular Windows 11 apps are using more RAM due to Electron, Web components
(www.windowslatest.com)
The latest semiconductor manufacturer specializing in RAM is ChangXin Memory Technologies
As of 2019, CXMT had over 3,000 employees, and runs a fab with a 65,000 square meters clean room space. Over 70% of its employees are engineers working on various research and development related projects. CXMT uses its 10G1 process technology (aka 19 nm) to make 4 Gb (gigabit) and 8 Gb DDR4 memory chips. It has licensed intellectual property originally created by Qimonda.
So... whatever that costs. Although, I think this wiki is a bit behind the times, as they've got DDR5-8000 memory in flight according to TechInsights.