My 2013 didn't have any software lockups during the first two years that I can remember. After that I got about one audio lockup a year that required pulling fuse 79 to reset. This year I have had two lockups. The first one seemed to disable more audio functions than usual so I disconnected the battery to do a total reset. The most recent lockup required pulling fuse 67 to get things going again. That fuse supplies several modules so I can't tell exactly what went crazy. After the reset, I got a screen saying something like "Performing scheduled SYNC maintenance." that took several minutes to clear.
Are others getting more frequent lockups?
I'm planning to install a battery disconnect switch to make it easy to do a system reset. This is the switch I plan to install behind the battery access door:
If there is any interest form others in the switch, I'll post some pictures of the installation.