Generally I have my two sons with me, so when touring in a dome tent, each morning, I had to pack all of the loose clothes up, put three sleeping bags in their stuff sacks, roll up three self inflating mats, and then pack the tent up. Often this would take 30 mins
There was also the odd morning that I was suffering the effects of being over refreshed the night before, so, it could be a bit of an ordeal.
With three swags, it's much quicker, put the pillows in the car, then roll up and away we go. Ten mins tops.
Further a swag has significantly better thermal qualities in cold weather camping.