It's probably part of the reason, as forcing you to use Olight's own 'known source' cells means they'll have some degree of eliminating people using random substandard ones, or at least have more control over their accountability.I am curious if that is part of the reason they seem to pushing it so hard. Other than forcing you to have to buy batteries from them. I agree with Tasky that from what I can tell from their design they appear to be safer. I am honestly fine with it as long as the battery lasts.
Safer in regards to the plastic ring around the + but still a bit odd to my mind, having both poles at the same end.
I believe someone confirmed the Olight 18650s as being Samsung 30Qs, which suggests they'll last the same.
But really, we seem quite happy to use proprietary rechargable batteries in our laptops and mobile phones and cameras and radios... With many new phones, you can't even yank the battery if the thing seizes.
The only reason for most people to use standard/common cells in a torch is if they already have some of that particular kind.
But hey, at least we have a choice.