It would be a wonderful addition if we could limit the artist's music to certain years. Some bands completely change their music over the years and just are not the same, It's like they are different bands. Take Chicago for instance. If you liked their early music it is likely you'll hate everything after Chicago 5 when they changed to a pop band. I know better than to make that station.
Right now I'm listening to a Genesis station. It's mostly not what I want, the grand large sound they had in the 70s with two drummers. I'll have to delete the station and there's no way to get the Genesis I want unless I can guess another band from that era that's similar enough.
This would be something I'd be willing to pay for.
Moderator Edit: Changing title for clarity