There are reasons to get NATS, and there are reasons you should absolutely not get NATS.

Unfortunately, you will never hear of the reasons not to get NATS in a public posting on a board, because NATS threatens to sue into oblivion anyone who publicly mentions the problems. There are, however, a number of programs that had NATS and switched to something else. Given the effort involved in making the switch, one would assume there's a good reason.

Anyone who has worked extensively with NATS is probably aware of the issues, and some of them might even tell you privately