In reply to tech:
Paul has summed it up well. Any guidebook pre-2007 is pretty much impossible for us to port to Rockfax Digital. It would be far quicker to start from scratch. Every guidebook post-2007 is already on the app.
Areas we have covered before 2007 that are not on Rockfax Digital:
Yorkshire Gritstone Bouldering (2000) - It is certainly not possible to convert this one but, rest assured, we are currently working on a new version which will be digital first - maps photo-topos, the lot.
Costa Daurada (2002) - Partly digitized with Siurana and a few other crags around Barcelona, but some of the other crags in the book have not been converted.
Lakes Bouldering (2005) - Another one that is too old but we are working with the people behind the current Lakes Bouldering guide and hope to get something out from that soon.
Sardinia (2002) - This was only ever a small PDF.
I don't think there are many more than that so it isn't a huge back catalogue of redundant information and I doubt it is actually causing honeypotting, or neglected crags.
Additionally, we don't include only currently sold guidebooks on the app. Rjukan for example, is available on Rockfax Digital but it has been 12 years since it was in print, North Wales Winter was in the North Wales Classics guidebook which is now sold out, but is on the app.
Here is a full list of our 'digital-only' publications - https://rockfax.com/climbing-guides/category/digital-exclusives/
Also, many areas have significant extra coverage as digital-only - Peak Bouldering, Costa Blanca, Peak Limestone, Pembroke especially but most have a bit more.
Thanks for posting the question.
Alan