I've travelled twice into the US in the past couple of months and about to do a third trip. The first time was stressful, but that was on me. The process itself was quite smooth and not time consuming. I've heard horror stories from people, but that was because they waited til the last minute or didn't fill out the ArriveCan app properly -- the app can be glitchy though. I just came out of a US based meeting; some continue to attend via Zoom, some in person. Most not masked but some in the room were.