You sound like taxicab drivers who fail to recognize that their days are numbered.

Since 2011, United has been reducing regional ASMs while upgauging their regional fleet. Even with all of the shrinkage and consolidation at regionals, they have schedule reliability issues due to short staffing.

RJs have two problems.
1) RJs are expensive to operate. The flight crews could be paid nothing and it would still be more expensive per seat mile to fly an RJ than an A319 or 737-700.
2) the number of qualified pilots is shrinking while demand is increasing.

Tell you what, let's revisit this topic in five years and you can tell everyone your opinion of the future of RJs at that time.