He would only be missed by his fans...it's not like he's running near the front every week, anyway, as it is. He's basically a non-factor. A large percentage of his fans can be divided up into 3 categories:
1. Fans of his dad...went to Jr - These are the Jr. fans that don't care if he finishes 43rd every week, they will always be his fan, just because he's an Earnhardt. They don't care how bad he does. If he leaves the sport, they will look for another Earnhardt to cheer for...if there are none, they will quit watching all together...not true fans.
2. Fans because of the media...these are the ones that probably didn't know much about Dale Sr. but always seen Jr. wearing his Wrangler, drinking his Bud's, and getting jacked up on AMP on the commercials so they assumed he had to be the best driver in NASCAR to be the one they seen on TV most...so they started watching. These are probably the ones that after watching a few races now they are starting to wonder if they should find a new driver, or what's going wrong with Dale Jr. to make him keep finishing bad. If Jr. quit racing, they'd find a (hopefully) better driver that produces some excitement.
3. Delusional - Beer throwers, who think Jr. is the only car on the track...very similar to #1, but these are the ones that make all the excuses as to why Jr. is losing. But they are running out of them...if Jr. quit they'd probably quit watching as well, cause they are not true fans either (How can anyone throw beer at another driver?)
Let me clarify he does have some true fans on here that realize he isn't perfect and makes a lot of mistakes like dalejr4ever, foxfire, Steffy, boondie and a few others that I can't think of right now...but you read a lot of answers that say Go Dale!!! Booo (Insert driver name here)!!! and you know that those people have probably not watched a full race in their life
You don't wedge...I went to work after I posted this answer and forgot to clarify that you were not one of the people I was referring to...which I was hoping you knew by me answering this question lol...but no I definitely wasn't referring to you, or anyone in particular, just generally.