See here: Where should a plugin or widget cache its results?
I'm trying to help the OP clarify/focus the question, but I'm struggling. As it is, it's bordering on not a real question, due to its vagueness. There is definitely a good question in here, but I could use some help getting it where it needs to go.
I have noticed that very general questions get less traction, often because the answers border on opinion rather than experience.
Specific questions often cause the light-bulb to go off because someone has been in the exact same scenario and thus knows from memory how to handle it with a real answer.
What I have tried to do a few times in comments ( I added one to your above link) is try to get the user to make the question more real-world and specific.
