AT&T’s CTO, Andre Fuetsch, always manages to inject a new shot of excitement about the US giant’s network transformation, when he shows up at industry events – even at a time when there has been considerable speculation that AT&T is backing away from some of its more visionary statements about 5G architectures, and particularly from using new entrant vendors or extensive multivendor deployment. Certainly, its approach is evolving. It is becoming more and more focused on public cloud – initially for IT and back office applications, but now Fuetsch has confirmed what always seemed logical, that some network functions would be hosted there in future, rather than on AT&T’s own cloud. One area where there is proof that AT&T is…