Earlier quoted context omitted.
I don't have anything against Tensorflow, but I've learned over the years that it's good to have competition in numerical libraries and software so there's replication of results. Try your analysis using one library, and corroborate it using another one. When a field is dependent on one major piece of software, it's more susceptible to bugs--a programming bug becomes a misguided line of research for a whole field. Ed…
Who's the numpy competitor? Are we suffuring due to lack of one?
I think point still applies for new developing software: multiple implementations can corroborate each other or help identify bugs.