Yesterday (Friday 20-March) flew from DEN-STL on UA.
I then flew STL-CLE on CO.

FYI - My UA flight was oversold and I volunteered at check-in and at the gate. In talking to a non-rev I was told that the RJ was over by 1. They did not need any vols. However, at boarding I was given a $50 UA voucher for volunteering. Not a coupon, but a voucher.

I was in STL I had around a 3 hr layover and hung out near the podium.
Two GAs were working furiously (with no flight nearby).

All the 50-seat RJ flights out of STL (to CLE, IAH, and EWR) were overbooked.

When they stepped away to work an incoming flight I saw their screen.
The 5 remaining flights were over by 2, 3, or 4.

My CLE flight was oversold and the GAs were working with Air Canada over two hours before departure. The GA's had 4 pax traveling to Toronto which they rerouted directly on Air Canada ($200 comp). The found the bumpees at the check-in counter.

In the end, our flight cleared two standbys and went out with an empty seat.