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All any company wants is profit... The RD involved with supercharging systems is much more involved. GM and Ford both refuse to develop their own systems (EATON). Those that do develop their own system are required to invest tons of funds into R&D. Most guys can custom manufacture a turbo kit, where in especially screw charger setups they have to be completely designed and manufactured for that particular engine model. Where turbo's you can mix and match and swap accordingly in your own garage. Where a roots charger has to be cast and made for each car's individual intake. Again means it takes way more funds to develop which makes profit margin less and most desings like Eaton,Magna, Kenne are all patented designs using only their components. Its alot easier to make a turbo kit for 10 cars that uses 50% of the same components where a supercharger will only fit one drive train and share maybe 10% of the same components.
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