Verdic isn't being a dick (That is, if your remarks were directed at him and not at Stayinpuft, who I'm inclined to believe was your intended recepient, Crimson). There is certainly a precedent for revamping and updating things, so in a hypothetical third Ghostbusters movie there's a good chance Ecto-1 will be replaced by something more modern.
But there's nothing saying they wouldn't bring back the classic. The first car is all shiny and running again, and if you ask me is in fighting condition to take back to the streets of New York… especially with it being so iconic.
Stayinpuft, firstly, take yourself off of your ivory tower, tone down the attitude and aloofness. The people you call children are exhibiting more maturity then you are.
A lot of the points you've made would actually be more accurate if we were dealing with a franchise reboot, not a simple sequel.
Jim, admittedly this is what I've heard, so take it at face value, but rumor was Dan tried to purchase one or both of the Ectos, but Sony wouldn't have any of it.
I can also see why Dan did the Ecto restoration besides money, the man is passionate about the franchise… and if you ask me, the excitement he shows at seeing the restored car, and driving it, is genuine. He's not just there to cash another royalty cheque.
Also, the XGB Ecto-1 did have two lightbars. I'm not sure why you felt there was only one.
My choice for any ‘update’, would be to go the videogame route, a Ecto-1 with 1A livery (but with the classic logo) and with a toned down roof-rack, similar to the original. A good mix of elements from both movies that remains practical.