I don't think one would ever recoup that $10k in fuel savings, range, efficiency or maintenance.
All the emissions... $$$ when it starts failing.
My better judgment was to get the gasser, because GM's gas engines are (aside from the latest lifter issues) bullet proof. 200-250k miles of trouble free service is the normal. I'll be surprised if I get that out of the diesel, not the engine itself - all the emissions stuff, DEF heaters and injectors, particulate sensors and filters.
BUT - I knew if I didn't get the diesel, I'd regret it and wish I did. 900 lb ft...