Good spot. The Google cache is still of the original page, some amount of time left to check through the site. I think that a lot of the information was included in the GroundUp winter guidebook and only bits and pieces have been added since, barely used at all in the last 5 years.
I added a fair bit regarding the routes I did back in 2017, including photos. It's a real shame if it's gone, because there's actually lots of places where there is very little information in the guidebook, but where well described on the Wiki - Crib-y-Dsygyl the most obvious.