I am not being a horses backside here, but, if you take long rides every week your oil will be in better shape than short rides, especially if your oil doesn't have time to get to higher operating temperatures. When your oil heats up it allows water that may have condensed in your crankcase to boil/evaporate out preventing that water from sitting on metal parts. Short trips that don't warm the bike up don't allow this to happen. I ride my bike year round, change my oil at 5000 miles and have it tested occasionally. I use Rotella T4 and have for the life of the bike. I have never had oil tested that did not meet or exceed every minimum standard for protection. My KLR 650 now has 84,400+ miles and still going strong.Like you said , there are many variables like if you take long ride every week then replacing oil at short interval will be good , but if your ride are short then oil change can be stretch a bit,
Using good oil is key, Make sure it has the MA/MA2 rating. The engineer at the oil test facility I use says that wet clutch (motorcycles that use the same oil in the clutch/transmission/crankcase) tend to sheer oils pretty quickly. A good MA/MA2 oil will withstand this better than regular automotive oils.
I know this is a Versys forum, it will be my next bike. Sorry about the KLR reference.