Trump isn't running again, he'll be like 86, so he's not going to give a shit what comes next.

He's not planning on running again. He's planning on being king until he dies. Even if the GQP didn't plan on doing everything that they laid out to turn the country into a theofascist dictatorship (they do plan on it), the courts will be irreparably compromised for the lifetime of everyone currently alive. Optimism would be nice but the very real consequences of 15million people sitting out this election is that it is the last real one that this country will see and the last one under which many will have civil rights.