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The Webb telescope is a _wildly_ different apparatus, designed from the ground up to run as cool as possible, and with an effectively unlimited budget. It lives in the shadow of the Earth behind multiple layers of shielding. These "data centers" need to live in direct sunlight and operate as cheaply as possible _at scale._ Very little of Webb's tech is applicable.

Keeping things cool in space is very hard. On earth we usually transfer heat from one medium to another (water to water, water to air, etc.). In space that's not possible because even though the matter in space is quite cold, there is very little. Therefore the only real way to get rid of heat in space is to radiate it away (think infrared light bulb). The James Webb Telescope does the same thing.

There are two real challenges in running a data center: how to get power in (reliably), and how to get heat out.

Any data center that isn't generating massive heat is a waste of our time.

And no, JWST is not doing industrial scale cooling.

Thank you for the responses. I understand the issue a bit more now.