Many people are using alcohol-free mouthwash these days. In the past, mouthwash with alcohol was usually all that stores had to offer. But then there were reports of the regular use of alcohol containing mouthwash leading to oral cancer. It hasn't been proven but some doctors believe there is a link. So people are slowly switching over to alcohol-free mouthwash.
I have regular mouthwash with alcohol but I don't use it often because I do believe that it removes the good stuff along with the bad. Our mouth produces antibacterial agents in our saliva to protect our gums and teeth. So I only use mouthwash twice a week.