Embarrasing Moment Incoming...
Somewhere between now & 2021, NASA is going to have an SLS standing straight & tall on the launch pad, with the public taking notice for the first time (Right now, the average American doesn't know SLS even exists) and you can bet that Elon-who-must-not-be-named will have a Falcon Heavy or even a Starship (What, he couldn't just call it 'Coolname'?) sitting on the launch pad next door, possibly with a sign saying, "This costs less than 150 million dollars and has flown several times." leading to... a rather unfortunate series of comparisons, beginning and ending with, "Why does one cost 10x more than the other?"
And then sit back with the popcorn and watch the fireworks...