I've only done it when I absolutely had to. Like, last trip, we rented off redweek an owner at Animal Kingdom Villas (Kidani) for a week, Saturday to Saturday.
My daughter's school spring break started that Thursday, so she, my son and I went down Thursday and stayed two nights at Pop Century, then moved over to Kidani (we took an Uber XL with our luggage).
We didn't unpack at Pop, and ended up waiting quite a while for our room to be ready at Kidani (I was anxious to get unpacked & settled in, and to put away our Garden Grocer order of food that had been delivered to the bell services).
It wasn't ideal that trip, and I've done it one other time when it was a similar situation (did a Sunday to Sunday rental at the BWV so stayed at the Swan Saturday night, then walked over with our luggage the next morning, then our villa was actually ready super early which was nice).
I do not do these by choice, as personally I like to unpack and settle in. I don't like how you lose time moving day. I'd rather choose a resort to stay in the whole time, for at least a week if possible.
Some folks do this as a deal may only be available for certain days, or they want to experience different resorts during a trip. We typically only spend a day or two by the pool during a trip, so one resort is fine with me!