Depends on the type of shirt I wanted. On a dark shirt, I would be surprised if anyone would argue that an opaque transfer is preferable to a properly printed
DTG shirt.
For a polyester shirt, sublimation wins hands down. For certain designs, I also really like the faded vintage look of sublimation on a 50/50 shirt.
For a white or light cotton T-shirt, I think it would depend on exactly which
DTG and which transfer paper you are comparing. I would really like to see some good durability comparisons between Kornit, T-Jet, Borther, Softstretch and Imageclip.