Nope, only playing 3 at the moment. I have 4 but haven't installed it yet.
I'm not sure my system specs are up to 5, so I'm waiting to see what further developments come along with the game (and mods for it) before I even look at a possible upgrade just for that.
No doubt there will be others along who play it, but if you haven't done so already head on over to the dedicated SH5 forums and I'm sure you'll find lots of info and suggestions.
