Rich Text Summary Field at Asset Layout Level

Rich Text Summary field at the asset layout level would be super useful. I can think of multiple use cases where I want to write a paragraph or two about a group of assets, which wouldn’t work if I did this at the asset level.
For example, Printers. Each Printer is listed as an asset, but I would like to write a few comments on printing overall at a customers site.
This would be useful for most Asset Layouts.