IMO the best way for a manufacturer to do the 0-10v is a female stereo jack, either on a ~6 foot lead, or flush mount.
In terms of the overall retro fit, that's a hard one as obviously it is going to have to require some degree of modification to the aluminum profiles to at minimum support the voltage input, and the extra wiring. If going that far I suspect many would also like to go with a single power cord as well, which is another mod on it's own. What are others thinking of in terms of wiring that's going to have to go between the fixtures? I know my thoughts, but that's a rather extensive mod and basically re-doing the fixture wiring from scratch.
In terms of the overall retro fit, that's a hard one as obviously it is going to have to require some degree of modification to the aluminum profiles to at minimum support the voltage input, and the extra wiring. If going that far I suspect many would also like to go with a single power cord as well, which is another mod on it's own. What are others thinking of in terms of wiring that's going to have to go between the fixtures? I know my thoughts, but that's a rather extensive mod and basically re-doing the fixture wiring from scratch.