Exactly, there are still many near new No4 rifles around; why change the main collectibility factor??
If you want a new "un-wrapped" No4Mk2, you can easily find them, as the cachet seems to quickly wear off after they are unwrapped.
I've had No4Mk2s "in the wrap", "unwrapped but still in cosmolene", "cleaned and unfired", and "lightly fired" condition.
The only one with any legitimate "cachet" is the one still "in the wrap", all the others are just another (used) rifle.