Meant to point out that "parousia" is 3952 in the text I provided above. They didn't ask when He would return, they asked when His presence would return. This is a hugely important distinction and solves so many problems.
Ask yourself, did the age terminate at the Cross, His resurrection, or when the temple was destroyed and the nation of Israel dissolved for nearly 2 millennia and with it, the Law?
This could be a case where trying to understand a dead ancient language could be causing confusion PW. Paruosia simply means presence like "in person"... It seems to me like you're changing the meaning o the word to fit a non-bodily return. I could be wrong but that's how I see parousia, just presence, nothing mystical about it.
I'm KJV only and it says the end of the world and yes I believe "the world" ended with the resurrection of Christ. We are in the world but not OF the world.