I did some research and it was 11/15 when Fritz 15 came out and 11/17 when Fritz 16 came out, 2 years in between the last update. Since I no longer buy green bananas I think I will opt for Fritz 16 for $55 delivered off of a chess vendor.
Looks like you are right. They may have switched to an every other year schedule like they do for CB15. That would actually make a great deal of sense.
I personally would get the Komodo version instead of Fritz, but either way, you'll do fine. You are really buying it for the GUI and other features, not the engine when buying Fritz.
Thx again, analyze my own games and also start an opening repertoire since I never had one. I use chess.com for tactics and lessons and the new puzzle rush on here sure makes you think fast.
Keeping the plaque off of my brain and trying to stay warm in Wisconsin.