One of the biggest issues with hardcopy publishing, just when you think you have everything in order new information hits your desk. Then you get that new data included and bingo, more comes in. Digital publishing has a significant advantage of instant and running revisions which can be done on a regular schedule (and these scheduled updates can be used as subscription incentives). Don
I'm glad that the new Springer is being worked on. I have the 7, 8, 10, but missing 9 which has a lot of tobacco stamp items has caused difficulties in cataloging. And the color images would be much appreciated as well.