If you have a moving map GPS of any type, there is no way you will ever not know where you are while it is working. Period.
PS. One point though ... I'm pretty sure airspace busts have actually increased since GPS came along. Why? Well, I really don't thinks it's just because some "foolhardy" pilots don't use it, do you?
Dunno, but I do know that pretty much ALL airspace busts in the UK are now reported, where as in the past this was not the case, and this might just have something to do with it....
Regards, SD..