It might be enough for this company, but if you are a big corporate, it's definitely not something to do. You cannot expect millions of consumers to just be ok with the fact that the mobile app is done because it's too hard to keep in sync staging and prod.

I am maintaining the infra for a big mobile app and our staging environment allowed us in the last year to have only two production incidents and they were not due to code source (networking).

I really recommend any serious business to at least try it and see by themselves the advantages