This is the right answer for the time in which we live.
Their old Marder was not only technologically antiquated, it was conceptually obsolete. Steel hull that spalled bad, no stab, 20mm with poor ap capabilities, a Milan that lacked range, required its user to expose himself, one shot ready to fire, was for the longest time jammable with shitora, and had anemic behind armor effects. No thermals for the longest time, no gps for the longest time, no ERA, no defensive aids which they also now added to the Puma (realize, ever since ODS, the Bradley came with a defensive aid suite, that’s largely why they had to massively upgrade the electrical system on ODS because of the demands of a MCD, laser detectors etc). The Marder wasn’t a first choice pick when it came to IFVs.
Aww- c'mon Red6, how long has the M113 been in service? IIRC, it was originally designed in 1957-58 time frame, and fielded throughout the US Army inventory up to 2008, and some units may still have them in their inventory. Bigger, expensive, and overwieght does not equate to a better piece of equipment. Although I like the fire control system of the Bradley, I'd take an M113 any day of the week.