Just going to throw this out there as more food for thought:
Think, for a second, of all the different applications of oil-injected 2-stroke engines over the years. In my opinion (right or wrong as it may be), oil injection has been around for decades and has had varying degrees of success. A lot of the reliability concerns of the system depend on the environment and conditions in which the system is subject to operation.
On marine engines, oil injection is a big conveinence and has served boaters well for decades. (The problems many people experienced with the blue Fuji engines on early-model Polaris jetskis were caused by fuel starvation, not insufficient oil.)
On street bikes, oil injection is also a big conveinence since its difficult to premix at a gas pump with fuel still in the tank. Plus, bikes engine-brake often, and the autolube system keeps things well-oiled even when riders are off the throttle.
On mopeds and scooters, especially the 50cc versions, the engine takes a beating and needs all the reliable oil it can get. Small 2-stroke engines get lugged on takeoff and are engine-braked to death due to the nature of the CV drive system. Oil injection works well here. Oh, and you can't forget that many scooter riders are not very mechanically-minded. They want the simplest, most reliable possible transportation. With a direct-drive oil pump and little chance of being flipped completely over, oil injection is quite happy on mopeds.
I'm wary of oil injection on ATV's because it has failed when used on outdoor power equipment. Most people run their lawnmower as hard as their ATV's. Anybody remember Lawn-Boy lawnmowers? Most of them were designed to run pre-mixed fuel.
BUT, Lawn-Boy did experiment with oil injection at one point and quickly scrapped the system when people would run the engine low on oil, only to proceed to tip the mower over to service the blade, causing an air lock in the system. And these mowers used a safety switch which would shut off the spark if the tank got low on oil. Good try on Lawn-Boy's part, but nothing is foolproof even with safety switches.
Last thing: The RZ 350 street bike was oil-injected. But we all know that system did not carry over to the Banshee reincarnation of the same engine. Why? I think Yamaha had their reasons. The Blaster, on the other hand, was meant to be an entry-level ATV and Yamaha kept the system in use there for conveinence. Not to say that it doesn't work, but having seen how hard most Blasters (including mine) are ridden, I don't want to take chances.
My .02.
