Hmm, a very interesting development. Thanks for posting this!
Before I found MMM, I saw an infographic with the old multipliers, and I set up a bunch of 'goals' in Mint with the old multipliers with my 'official' retirement accounts to act as intermediate, more achievable goals. I'm trying to decide if I want to update them or not. If I count my total investments, I'm still ahead with the new numbers. I'm definitely only barely scraping success with the new numbers and only retirement accounts. This might call for a spreadsheet instead of Mint goals since then I be more flexible about what counted for what. Seeing myself 'ahead' of these milestones is a very artificial success, in many ways, but it's still pretty motivating for me.