I have been dealing with an mcl issue since this winter. Have some other issues that maybe need AS, just don't know. Most of the advice I have gotten has centered around driving until the wheels fall off, cuz once they cut it out it ain't coming back and you are just that much closer to knee replacement. Though they are doing pretty good things with them nowadays. I live in a ski town though where almost everybody has what they call a locals tattoo(surgery scar).
Cliff notes: If it is really hampering your life, maybe surgery. If mostly discomfort, maybe not necessary yet. I am driving til the wheels come off probably.