I've been told that a testnet is just like an actual chain in "real-time" being utilized, but then others have told me it's not.
Testnet is just a network where coins have no monetary value and its purpose is to test things before deploying them to the mainnet. It is "actual" as in "real time", but I don't see the relevance of forks or chains here. What's the catch?
I understand that aspect of it, & I actually have some bitcoin testnet coins that I’m aware have no real value.
Have you read the title of the thread? The discussion is around block size, and I know Pooya is an expert so was speaking to the threads discussion.