Well, for me I can do without the holdopen when I shoot.
I never load the mag with more than 5 rounds anyway, and I do tend to count when I shoot.
Of course I want to avoid inadvertant dry-firing...
Still, I think the gun should have a holdopen (even if now non matching) in the event that I would like to sell it. (which is not the case now for sure. I like this gun!!)
Had to go to the police station today to verify my serial numbers and the entries on my permit (part of Dutch weapons documentation) and we had a nice chat about Lugers in general. In general the Dutch police are very reasonable... and likeable people, at least the people I know now through the documentation procedure for weapons ownership.