Based on this thread, I just bought a good used 2015 driveshaft for my 70k miles old 2013 SE.
I don't think my final drive has ever been off. So, I don't think the driveshaft splines have ever been serviced.
I got the bike at about 58k miles, & did the 60k mile service on it, but didn't think of luring the shaft splines. I should have, by now.
It was an "annual" thing that I'd do on the Venture that I had previously, but didn't hear any issues with it on the SE.
Now, as they're getting miles & aging, it's turning up, perhaps, as an issue..
So, I got the good used shaft as a future maintenance & repair item, assuring it's availability to me for a paltry $100...
Cheap insurance.