I don't think the Vol/ C50 has any kind of reputation for being soft. It last as long as any other motor in its size range. This is a big bike, longer and wider than a Harley Road King and weighs over 610 pounds. The Suzuki is only 805ccs, and it is geared steeply to get acceptable performance, so that engine is working hard.
Despite this, it seems to last just as long if not longer than other bikes in that same cc range, even when they are in lighter bikes. I think Suzuki did a darn fine job with this motor, and it lasts as long as can be reasonably expected. No, it is not going to last 150,000-200,000 miles like a Road King or GoldWing can, but a Road King weighs only 25% more but has 200% of the engine displacement; the GodlWing weighs 50% more, but has 230% of the engine displacement. Sure, they last longer, but the Road King costs 80% more than the C50, and the GoldWing costs two and ahalf times when a C50 does! For a large, heavy bike with a moderately sized engine, with a price tag of only $9,500 brand spankin new, I'd say that the C50 is a darn good bike with a life expectancy of 50-75,000 miles.