Armor Porn. M1128 Stryker Mobile Gun System

Note.  How could such a seemingly simple concept have turned out so badly for the US Army?  Many countries have mounted large caliber cannons on medium weight vehicles and had them perform successfully...but we haven't cracked the code.  A big question is on the horizon.  What happens when a light tank (IF) is introduced into service?  Will Stryker Brigades have a new direct fire asset or will they try and adopt the turret to fit the Stryker...or will they do for a foreign offering from CMI or another defense contractor?