Black Diamond's drawback is they need a separate "collet" for each size drill. A set of 1/16-1/2" will cost about $100. need a different set for fraction, letter, number drills. Not sure how much range each collet has. Maybe you can make things fit into the wrong system collets.
They are not really collets. There is one "master collet". which is a real collet with a draw thread to tighten it. All the rest are simply spacers with a outer and inner diameter to suit. They have a slit or two to allow them to closeup. Not too hard to make a few specials as needed. But small inner bores will be harder to get right.
I see that as a benefit; the drill is held by a nearly fully circular bushing/collet so it's going to be held about as true as it can get. It's only a drawback if you buy a grinder without the accessories, which most here have mentioned. New bushings are pricy, and used ones don't come up that often. The grinder itself does a great job. I used one for decades at an employer's shop and liked it so much I bought my own.