The next time you are about to use the word “affordance”, please stop and check if the word “cue” would work instead.
Because if it would, then:
1. you are using an obscure technical term for something that already has a perfectly good plain English word, and
2. you are using that technical term incorrectly.
Yes, I know that languages are living entities. None other than the eminent Don Norman, despairing in his attempts to correct the misuse of “affordances”, has cited this as a reason to abandon the term to its abusers. Yes, words can change their meanings. Generally, I celebrate this fact. But not this time. Technical terms are different. People can start calling air “Oxygen”, but that does not mean that scientists should change the periodic table.
And this is an important technical term. It describes something very specific for which there is no other word. When J.J. Gibson went to the trouble of making up the word “affordances” in 1977 he thought long and hard about it first, and he coined it carefully so that it actually makes sense. An affordance is “something that is afforded”.
“The affordances of the environment are what it offers to the animal, what it provides or furnishes, either for good or for ill” 
Affordances are not the cues in the environment that let you know that something is afforded to you. Affordances can be hidden, or perceived. Designers can make them easier to perceive by adding cues. Cues can lie, but affordances cannot: they are what actually is possible. We need a word for what the environment actually makes possible, and affordances is that word.
There is no reason to misuse the term “affordances” when you really mean “cues”. If you hear someone else misusing it (and I don’t care if it is Jared Spool), then call them out. We need this word back, and if language is indeed made by its users, well that is us. We can make the choice to use this word well, or to waste it.
Thank you for your attention.
 Gibson, J.J., 1977, “The Theory of Affordances” in Perceiving, acting, and knowing: toward an ecological psychology
eds. R. Shaw, J. Bransford, Lawrence Erlbaum Associates, Hillsdale, NJ.