** (Mix) Unknown type `:timestamp` given to generator

What about this issue? Why use `utc_datetime` over `naive_datetime` for Ecto? - #2 by LostKobrakai

It seems that I should use utc_datetime instead of your suggestion :naive_datetime, or?

Source:

Definitely use :utc_datetime_*. In hindsight, we wish we made that the default in Ecto but now we can’t due to backwards compatibility (and there are no plans for Ecto 4)

This seems to be quite polarizing topic. It would be great to know the opinion of Phoenix veterans what version they use in their projects.