By now, I would assume most companies have already made the jump from Aurora 2.x to Aurora 3.x to avoid extended support costs (i.e. penalties).

If not, note that by default, Aurora 2.x will accept non-latin1 characters.

Aurora 3.x does not do this. It will return errors when a non-latin1 character is added. Depending on how your clients handle these, it could be an outage waiting to happen!