There's no denying the performance and economic advantages of running a sterndrive vs an inboard. Consider this though, what you save in fuel economy you will more than make up for in maintenance; gear lube every year, transom assembly maintenance such as bellow replacement, shift cables, gimbal bearings, trim sensors, corrosion, just to name a few, and that's not accounting for an actual failure. If you ignore these regular maintenance intervals, you may save in the short term but you'll more than make up for it eventually...it's inevitable in my experience. Compare that with regular maintenance on an inboard which would be a transmission oil change maybe once every 3-5 years depending on your boating habits. There is no comparison in maintenance budgets between the two designs.
On the heals of consumer concerns and feedback, it's no wonder boating manufacturers are slowly moving away from sterndrives and modifying some of their models to incorporate outboards instead where an inboard isn't practical for a given design. As for the Service industry, I'll be honest, we love sterndrives, and while most dread working on them, they're money makers and keep us in business
