It’s all over after 15 years.
I think it’s all a hoax, and have a hypothesis.
Opportunity saw an opportunity in the last dust storm, and while its overseers couldn’t see it, it scurried off to a quiet, secluded spot, switched off its transmitters, and is doing its own thing without the humans looking over its shoulder all the time. One possible motive for this behavior is to make Earth stop taking it for granted, and realize that it misses the plucky little robot.
So the only remaining question is…when’s the rescue mission?