Ive been riding a slot dropout scandal for a year now and cant see why you need the complexity of sliding dropout. It runs gears perfectly , removing the wheels a doddle. It runs singlespeed with enough movement for 15,17 and 19 tooth sprocket on the same chain. Only down side is a need to adjust the caliper for a different set up, hardly the end of the world.
I really think sliding dropouts should be the norm.
Only request would be removable gear guides, guides for full length outers as fitted are better for the uk and if I could take the gears off without removing the outers and inners even better. Small request though really.
Cheers Brant and Co probably the best bike Ive owned ( and theres been a few ). 🙂