Push is supposed to be a superset of create, so we're carrying significant code debt. The slight mismatches in their functionality are mostly mistakes, e.g.:

• create locally validates the template name whereas push does not
• create accepts TTLs whereas push does not

We should make sure to deprecate create for a period of time, perhaps with an annoying time.Sleep. We should also change push to create a new template by default.

Bonus points for reducing duplication across template edit too. See #9319 for an example bug.