I don't think there is much of a problem doing cardio after lifting if its done right. For example, I would be sipping some BCAA's and protein throughout the workout and into the cardio session to help prevent the catabolism especially when on a cut. This is pretty much what Chuck recommends in Scivation's "Cut Diet" book and it helped me prevent catabolism when I was working out 5 days a week with 45 minute cardio sessions afterwards.

Now I do think its different if you simply have a preworkout shake then worked out for 45mins to an hour, THEN did cardio for 45 mins. I can see that eventually not only hurting your results from training but also your muscle mass.