The housing market is absolutely insane right now - my wife and I rent and we wanted to move this year (actually wanted to move last year but cancelled those plans because of the pandemic). We've been looking pretty much since January. A couple of stories from our search:
One place we really liked was already basically rented within an hour of the listing being posted - I was #2 in calling them (been up for an hour) about it but someone had already been there and put in their app within that first hour. Got a call back about another hour later and it was rented.
Another place we drove to see - looked great in pictures, but when we got there - windows were broken, some looked like they had been shot by something small caliber from the inside, the floor sunk when you walked, the garage had rotted near a fireplace and the roofing had fallen in, and the dishwasher looked like it had caught fire briefly. We noped right on out of there after seeing all of that.
A third place I called told me that I was the first person to contact them and they would send me a video walkthrough the next day at a specified time (currently occupied so had to get permission). An hour after that specified time the next day, I hadn't heard from them, so I messaged them and they replied back that they rented the place to someone else.
Many places would be online like an hour or two and already have multiple applications for them.
The place we ended up getting (as we're moving next month), I saw and called them within 20 min of the posting to secure the first spot in line, then showed it to my wife, because waiting would have not gotten us that first potential spot...