I'm in favour of the extra security it provides - which is great for most people who only have 1-2 domains - but the registrar I'm moving away from has no facility to provide bulk details of all EPP codes.
You have to manually go into the control panel (which is extremely slow and clunky) for each individual domain and request the code to be emailed to you
50 domains is just about do-able (especially as I will spread it out over the next few months, moving the domains as they come up for renewal) - but what about the domainers with big portfolios? How are they coping with this?
If I wanted to move 1000 domains I'd be going crazy!