Nothing significant has changed.
At best, .mil residencies are average. Are you a superstar? Do you think you might be? It's hard to say because I took not just a little bit of pleasure in watching several elite college high flyers with big egos descend into mediocrity during the first 2 years of medical school. If you're MGH material, you'll find the .mil probably let you down. HOWEVER if you're doing something like primary care it's probably not tremendously different. Often research opportunities are limited and mentorship can be transient 2/2 shifting of the staff. Having said that, depending on your specialty, and motivation, you can probably still do fine, particularly if you want to do a civilian fellowship.
If you're after a big academic career with research goals and dream of teaching med students/residents/fellows the .mil isn't the best place to start your career (with some limited exceptions).
I worked at a couple big baller academic medical centers and at the Starship of Navy Medicine in San Diego. I can tell you without exaggeration that my worst days in San Diego were fairly equivalent to my average days at the Big House. Everyone gets some sick patients and tough days, but the acuity and routine cases were an order of magnitude higher at the premier civilian referral centers. That may not matter for many/most physicians (FM, EM, Gen Peds, IM, etc.) but it DOES matter in the specialty and subspecialty world. You want routine exposure to that complexity and the associated challenges as a trainee. It makes you salty. Any dumb ass can do an appy or a lap chole or whatever routine procedure, and you can learn tricks to improve things like speed and turnover. But when you're out on your own and the **** hits the fan, or some real train wreck comes through the door for an emergent procedure, you yawn and get to work knowing you've taken care of worse.
Search your soul, evaluate your chances at superstardom, ponder your long term goals and roll the dice.
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Il Destriero