I used USPS in March to send in my keyboard to Corsair for repair. It got lost somewhere in Duluth, GA, and only finally got delivered to Corsair two months later.
I used USPS a couple weeks ago to send the Pixel Watch 2 I wasn't using to a friend. It sat in Nashville for 2 days before making its way to the local office.
I ordered some Flic buttons that shipped through USPS. They've been stuck in Philadelphia for almost 4 days.
I did a trade-in with Spectrum when they had that insane $700 off the S24 deal for almost any phone a couple months ago. It was sent through USPS and got stuck in Philadelphia for about a week.
Thankfully they've all eventually gotten through to their destinations, but this is a recent trend around here, and pretty worrying.