Am - now - totally relaxed. In my great naivete, I had assumed that Adobe cooperated with camera manufacturers just as Microsoft does with computer manufacturers. By the time new versions of Windows become available, there are machines out there which can run it.
My first reaction, when I realized that LR could not read my D7100 generated RAW files, was total panic. All is now well, the album promised for this evening is ready for presentation and I have found the D7100 files to be amazing in their color and detail.