it really depends on where you live, for me the benefit of growing in smaller 1 gallon containers, is i can get my plants in/out of storms way. this afternoon, i am in walmart(5minutes from my house), and as i am out in their garden centre, lightning starts flashing around me and the sky turns instantly black. for me, that's a queue to get my ass home and get my plants in the house. last year, i took my girls to our local public libray, again 5 minutes from our house, i notice a large black cloud appeared from nowhere with high winds, another sign, get my ass home fast. that day i just made it through the door and the hail started to smash everything in site. i saved most of my plants except a kung pao which lost a lot of branches and my skull that took the brunt of the hail damage.
in spring and fall, i can put my plants into totes and hall them in and out of the house quite easily. my plants can't survive a spring or fall evening and must be brought in every evening. during a short period in the summer, we suffer tornado warnings and hail storms can hit a moments notice.
by mid september, my plants have to stay indoors and having them in containers allows me to put them outside during nice times and bring them in, in bad times. overwintering is easier as well.