Hopefully it's okay and there is a backup. Or it could be an upgrade that is taking some time. It's a darn good resource.
Yes indeed. I have been going there since 2006. I seem to remember finding it from posting here about my old shower drain which was a cast iron clamping drain (!) which was leaded onto a PVC pipe with a tar paper as the "pan". Old School 1970s technique.
The drain was threaded and rusted together. Ended up cutting through it sideways with a reciprocating saw. It was a messy job.
I was told about Kerdi for re-building my shower and John Bridge's website was a wealth of resource to complete the remodel.
I've been going there for help with tiling projects ever since.
To have them disappear would be tantamount to Windows not existing. The resource there in invaluable.
And they are still down as of now.