SpeshulEd 

I feel like Road Tubeless is still in it's infancy whereas MTB Tubeless is a bit more advanced.

MTBikers accepted tubeless a bit faster and it caught on to the point that it's hard to find bikes with tubes these days. I also feel it's far easier to get a mtb tire to stick on the rim than a road tire, however, I feel the lower pressure used in MTB tires might allow them to burp air a bit more, especially due to the constant abuse MTB wheels see vs road wheels.

I feel Road Tubeless still has a lot of hit and miss, and if you want to try it, you either need Tubeless Ready rims/tires or expect to spend some time messing with your setup. I completely realize the way my wheels are taped currently are done so in a matter that shouldn't work, but so far so good. I fussed with my rims for almost a month, then I stopped caring and just slapped some cheap tape on them and it worked. *shrug*