Miragedriver
Brigadier
That's the Stryker Broccoli. A APC with remote turret however faces issues. It can't support infantry units if they come under fire from similar vehicles. As the HMG rounds lack punch. The aim of a IFV is medium fire support. It combines the function of a infantry tank with a APC. This means not only can it lay down antibunker and some antitank fire it also allows infantry units mobility. Now you are correct manned turrets eat up space on the inside most APCs have a 10-12 man troop complement but when IFV turrets are installed that drops to a 5-7 man complement. However that's with a manned turret. As you pointed out we have today remote weapons stations and all it takes is some scale to get a IFV with a unmanned turret. Now you can have the best of both worlds.
Well you could always bring back the M-113 in the form of the M-113A and the upgraded armor with the placement of twin 50Cal MG in an enclosed cupula. The US has 10,000 to 15,000 in storage.
I will now get back to bottling my Malbec