The nice thing about the "old" pre-2013 pin type QA was that you only needed to buy the pin-on attachments that fit those loaders. Many of the aftermarket manufacturers have pin-on options for the big B series loaders.
However, it'll soon be a "6 of one, half dozen of the other" scenario now that Kubota went to their "skid steer style" QA. Us B series owners still have "redheaded stepchild" QA's, whether we have pin style or SS style.
All I know is I'll suffer through the old style pin type QA cause I ain't changing over my bucket, forks, & snowplow. If I only had the bucket, I'd probably do what Jim is doing, cause the SSQA is still a bit quicker on the change-out.