“English common law has always allowed deeds to be transferred w/restrictions.”
You have it backwards, fruser1. English common law ended the dead hand doctrine.
Not what I’m talking about.
Common example in place today - Home Owners Associations.
Those are restrictions placed on the deed and run with the land.
I can transfer title myself with a restriction, such as to a church, for as long as the property is used for religious purposes. I can also say the property may not be improved (to make it like a park).
This is known as “fee simple determinable” title and is part of common law.