Not really. The GS is essentially a road bike with the 'dirt bike' look. As a road bike many desire road bike conveniences like no tubes.
Thanks for stating the obdvious.
Fact is though that they are designed to be able to cope with mild off roading, and are in fact used by BMW in their off road training programme.http://www.bmw-motorrad.co.uk/world-of-bmw/off-road-skills/
I'm not aware of any issues such as the one's you suggest, but then I'm sure you'll point me towards where there is actual evidence of this being a problem.
Because if you smack a pot hole and bend the rim on a BMW, you will also f up the spokes in that area causing far more problems to fix..
This may come as a surprise to you, but you can hit pot holes on the roads too.
The KTM 990 is much much more adept off road, and uses traditional center spoked rims with tubes. Because they know if you dent a rim, you can keep on going.
Know of any dirt bikes that run tubeless wheels?
I did read somewhere that is was becoming a popular mod for dirt bikes.
I'll try and find the link.
With the Griso SE, no-one has had problems with the orings. It's all conjecture. If you worry about that, I'd think you'd be far more worried about BMW FDs failing. At least with the O rings if one did ever fail a can of fix a flat (or an inner tube) would take care of you.
And the problem you describe with the BMW rims is being overplayed by you too.
I've had BMW's for years and never once heard of the problem you describe being an issue.
I think it's in your head but feel free to prove me wrong