Back in the day, those types of cards were available, though a little uncommon:
https://en.wikipedia.org/wiki/Z-80_SoftCard
https://en.wikipedia.org/wiki/Apple_IIe_Card
https://www.applerepairmanuals.com/the_manuals_are_in_here/P...
https://en.wikipedia.org/wiki/Z-80_SoftCard
https://en.wikipedia.org/wiki/Apple_IIe_Card
https://www.applerepairmanuals.com/the_manuals_are_in_here/P...
Many Apple IIs in the business world were only used to run CPM.
see Wikipedia: https://en.wikipedia.org/wiki/Z-80_SoftCard
"The SoftCard was the single most-popular platform to run CP/M"