mafoofan
Established
No need to be sorry.
To those who want so much automation that all the want to do is push a button, I offer this opposing view:
Selecting which frame to scan is part of editing, it forces you to examine your negatives physically. Guess what, it's good for your growth as a photographer.
Roll feeding unchains me from my desk, freeing up valuable time. It means I don't have to scan proofs, review, then scan all over again. I'd rather scan everything at the optimal resolution to begin with, then review and edit on screen as I please--how that would retard the development of my photographic acumen, I cannot fathom.
Keep in mind, some of us are busy with things other than photography and need all the time we can get to justify further pursuing it as a hobby.
Anyway, I suspect the relative rarity of roll feeding is due to the antiquated notion that film scanners are primarily for digitally archiving important, old negatives. For those of us continuing to shoot film on an ongoing basis, a faster, more streamlined workflow would be nothing but a boon. In 2012, we are the ones more likely to be buying film scanners, so it's a wonder to me the feature is not more widely available.