I'm jealous, I didn't know about the combined programs until after I matched. I would have totally done one. Just curious why you/your cooresidents chose to do it? I would have done it bc I liked both Pulm/CC and Anes(/SICU), so I'd have all options available (and other IM specialties) once I had more experience to really decide. Also seems like it would make you a better doc no matter what you end up in.
Some disclaimers - this is just my experience doing a duo residency - im not preaching that this path is for everyone or even for a majority.
First most of my classmates aren't super big fans of pulm thats why we choose to do anesth/med -> CCM at first. Could you do pulm/ccm after the residency? of course - but i think being a GOOD pulmonologist/CCM/Anesthesiologist will be very very difficult. For me i plan to keep abreast on most of my medicine background related to ccm and realize that once im done with residency my broad medicine base will slowly shrink overtime.
I don't think this path should be taken just because you want more time to figure out your career path - if you want to be a cardiologist - just do internal medicine, if you want to be a cardiac anesthesiologist, just do anesthesia.
Lastly i don't think a program necessarily makes you a better doctor. I think the program gives you training opportunities that if you are motivated enough you will benefit from. On the interview trail a lot of people asked me what I gained from duo training - i think most of it is a differing perspective then I would gain from a single specialty. For instance glucose control in the ICU - lots of new literature about it surrounding type 2 diabetics.. i think a lot of my co-pure anesthesia folks aren't familiar with nor with the background of where the magic (or not so magic) "180" goal came from - and also new Car-t therapy - a lot of the ccm guys think it is such a waste of resources and time - but from working with these patients on an acute heme service i feel a little differently... i'll leave it at that.
From my class all of us wanted to do CCM and Anesth,the funny thing is now we are all planning to do CTICU and cardiac anesth. We tend to be a group that LIKES micu and not sicu - i know most people here can't stomach micu so i'll leave it at that. One of the reasons i really liked the cticu is i get to follow the patients that i initially met as a medicine person - whether that be a patient with end stage lung disease in the micu or end stage heart disease in the ccu or both - and one day we can actually cure their chronic disease (WOAH!) with a transplant (or two!) if we can get them through it. Getting them through their transplant is rewarding to me, the lung patients in my experience tend to have a more tenuous course then hearts, obviously these patients usually come with all their co-morbidities that brought them to needing a transplant and I feel really comfortable taking care of those with a medicine background but also feel comfortable with the transplant side of things from the anesthesia stand point. Mechanical support devices is also fascinating for me for some of the same reasons above.. i don't considered them cured tho the way a transplant can but it definitely is a life changer for some patients... and now new indications for ecmo. I struggled with doing cardiac in all honesty - it wasn't part of my "plan" but as i've said before doing my 2 months of cardiac in the ORs and 1 month of CVICU sealed the deal for me.
Lastly to become "good" I realize it may take me a bit longer doing both things then if i focused on one (aka just anesthesia/cardiac anesthesia or just ccm) - but for my career longevity i do like doing both. I realize to be able to do the job I want I'd likely stay in academics and thats fine with me, I do have academic interests that I wouldn't mind continuing to pursue.
If anyone wants to truly know more feel free to pm me. I don't want to feel like I have to defend the combined programs they are just what they are - but i do want to say that I'm truly happy with my choice for the reasons i've stated previously.