You'd use the PR client instead. If he ever needs a Uno testnet because he can't work on PR, BW will create a genesis block for a new testnet and compile a new client. Testnet3/PR has long run off down the road as its own thing. It won't simply evaporate by resetting it, because there is a network and nodes that have arrived at consensus... they won't just immediately wipe out the entire blockchain and sync to block 1 of testnet4. You'd have to take down the entire network (which admittedly, might not be too difficult).
Anyway... its not a big deal to me. Its just another piece of UNO's interesting history.
I hope someone is writing all these adventures down. I'd be the first to buy the book, "The Unabridged History of Unobtanium." Chapter 26: Prototanium.
Well FallingKnife, it doesn't actually work like that. Once you reset the blockchain, you reset it all the way. Meaning, everyone who had PRO coins would all have 0 balance, back to block one. So, anyone that puts money into it, or trades it, loses all they had no matter what once the blockchain has been reset. And yes, that really is the point of the testnet, to just wipe it and start over if need be, not that it has been recently reset, but with testing and development it will need to be reset.
To really clarify the best I can: Yes, it does all simply evaporate by resetting it. Yes, there are nodes, they would all start from block 1 again. If you wanted to keep the coins and preserve the blockchain, you'd need to fork the testnet again and then it's no longer UNOs testnet, it becomes Prototanium as an entire new coin. In effect, that does actually just create another cloned premined coin as well. So, not a good idea at all.