No, because newer means faster processing, faster menus, more refined features, way way way better low light performance and better noise reduction. This isn’t Hasselblad or anything, this is consumer level stuff, never buy older than necessary. Newer you buy, less likely you need to buy again too.
No don’t shortchange with an old body now. Reap the benefits of more recent releases. Minimum get a recent-ish used 7D mk-whatever