Notes isn't exactly dead. A couple of years ago I helped a swedish county extract social services data from a system built on it, which is still in use by quite a few other counties.

Among other things I wrote a batch converter from the XML based export format to PDF files packaged according to a standard for digital archives, and we brought on a specialised consultant to help us out inventing an export for system logs.

I expect there to be many products still out there that are actually built on but not advertised as LotusNotes, waiting for someone like me to come along and figure out how to decommission them. As a RAD platform Notes/Domino is apparently highly productive for those that still know how to do it.