I don't ride on gravel so thats not an issue.
One thing I always have to remember when being a member of a forum like this is that in the grand scheme of things regarding the VN750 and all the years it has been made and all the 10's of thousands of bikes manufactured and still running great, most of these owners and bikes aren't members of a forum and have no clue that there is a potential issue with the rectifier or the dry spline issue or the weak charging issue. Those owners just ride their bikes and most of them put 10's of thousands of trouble free miles on them.
I can equate this to people that drive cars that have interferance motors and timing belts. For the people who know.. these belts need to be changed anywhere from 60K to 105K depending on the manufacturer. These people change their belts when they are supposed to and all is good with the world.
The other people, who have no clue, for the most part put hundreds of thousands of miles on their cars with the original belts and never have a problem. When I pulled the belt on my 2000 Neon with 105K on it as part of routine maintenance, it looked brand new. My waterpump looked new too. So did my front seal. After changing everything I have had a few issues with the car. Prior to that, not a single thing ever went wrong with it.