why not petition who you want? why discontinue something that is a success? while dsl or any marshall for that matter might not have impressed you, there are plenty of people out there that appreciate them. i, for one, do own a dsl 100. it's a ****ed good amp and sounds amazing with classic marshall tone and then some. it's very versatile and it sounds like a marshall. people like that particular marshall tone, and i'm one of them.
fender brought back several amps due to the demand. the created the supersonic in response to people who continually requested a higher-gain amp. mesa created the express series to satisfy people who wanted a great sounding mesa at an affordable price. pardon me, but i think it's ignorant to say that petitioning a manufacturer won't do any good.
the dsl was a great product because it was reliable, sounded amazing, and didn't cost an arm and a leg like bogner or soldano. there are plenty of legendary musicians who used the jcm 800/900/2000 series amps and got super great tone. does randy rhodes ring a bell? didn't he use jcm 800 amps?