I doubt it's worth it to achieve lifetime status for you in your current situation.

After all, all you'll gain is perks you can mostly enjoy when flying. Do you really want to MR for 16 years just to enjoy a few perks (most of which can be bought anyways) for the rest of your life at 25-50k a year?

My take is that MM status is worth something if you spend a good chunk your life travelling at 100/200K levels. People that fly that much, actually need the extra perks.