Owens-Illinois has had a department for decades in KTOL , through two asbestos-driven bankruptcies. It’s been smaller and bigger, flown all sizes of planes. The director has been in place much of those years and done quite well. Department longevity is dependent on lots of things-mgt support, how it’s businesses are located and why, is the department leadership good at managing it (produce value for expenses; and “selling” to management or the owner.
True private jets (HNWIs, usually) last as long as the money. The owner and principals value the plane as a means to conduct business and get back home/office. For these people, the plane is just like their limo-irreplaceable and not expensive. Every operation is unique.
GF