Looking for a story I read recently, where Tony and Steve reverted to baseline: Tony losing the arc reactor, and Steve losing the Super soldier physique (and regaining his multitude of health issues). Steve continues leading the team via a control center that Tony builds for him, and in the end, he elects to remain in his pre-serum body when Bruce discovered that to change Steve back, Tony would have to be changed back, as well.
Anyone? Thank you in advance!
Found! By rae_isha:
(There'll Be Bluebirds Over) the Highway to Hell by what_alchemy.