-Instead of buying a movie or a song, you stream it
-You don't own your data in the cloud
-You don't own the music you buy from Apple
-You can't even take the battery out of many newer model phones
n.
A political and economic system of Europe from the 9th to about the 15th century, based on the holding of all land in fief or fee and the resulting relation of lord to vassal and characterized by homage, legal and military service of tenants, and forfeiture.
Consider the inordinate attention (~homage) and data forfeiture which billions of people submit to those walled gardens (fiefs).
It seems symbolic that so many spend so much of their day with their heads bowed down towards their phone.