And if someone has a fico over 800, a credit card that takes $5k without blinking, the odds they are going to stiff you on a check seem stupid low. I'm sure most dealers can quickly ACH it, or verify funds.
I can only relate our experiences. We don't buy cars very often...likely averages out to 10+ years. Prior to last June the last time we bought a new car was in 2003...20-years ago!
In '03 we were prepared to pay cash but got lured into a $0 down, 0% 3-yr "loan". Total purchase price / 36 = monthly payment. In '95 and again in '90 we wrote personal checks for the full amount.
We did the same this time around. We were going to pay full amount and asked what form of payment they would like. The sales guy didn't bat an eyelash when he said a personal check was fine. This was a dealer swap purchase, so we gave him a $500 'deposit' on our CC. Between placing the order, getting the car from the remote dealer, dealer prep and installing some dealer options I had a medical emergency that delayed delivery. When I was released from the hospital, I notified the salesman that we were ready to proceed. Incredibly, he assured us that we would not need to make the 45-minute trek to the dealership...he would deliver the car to us and sign all the papers here. And that's exactly what he did.
Our Wrangler came with a hard top. We wanted a soft top but had to buy it as an option. I was in no physical shape to deal with removing the hard top and installing the soft top, so our salesman told us not to worry. When the soft top came in, he and another employee from the shop would drive to our home, remove the hard top, take our Jeep back to the shop, install the soft top and return the Jeep to us in a day or two at no charge! They had it back the same day! Who does that!?
The story is a bit bittersweet for me. All of the above occurred in June 2023. As a result of my previous hospitalization (and three more subsequent ER visits, additional surgery and two-weeks recovering in the hospital) I wasn't able to drive our new Wrangler until late August! But I'm making up for lost time.