The people who coined the term (OSI) gave a definition when they coined the term. That definition is almost universally accepted in the software world. Redis no longer meets that definition.
Just because something is a marketing term doesn't mean its meaningless. You can't sell non free range eggs as "free range" simply because its a marketing term. Etc
The term “free range” is almost meaningless when buying eggs - even the opening paragraph of Wikipedia explains this:
“Free-range eggs are eggs produced from birds that may be permitted outdoors. The term "free-range" may be used differently depending on the country and the relevant laws, and is not regulated in many areas.”
Just because something is a marketing term doesn't mean its meaningless. You can't sell non free range eggs as "free range" simply because its a marketing term. Etc