Hmm, sounded like "develop game for five years, then put it in periodic betas every six months, release at ten" to me. Public beta testing would probably help nail down their chronically buggy releases, but I doubt they'd let you play it for five years before releasing it. Especially if mods weren't supported. You could definitely finish a mod-less Elder Scrolls games in a beta period that long.
well i was thinking a long the lines of when ever you get to test it it wouldn't be the full game. just parts of it and a certin amount of people would get one part and then a nother certin amount of people would get anouther. so each time they realeas the new testing part of the game then it would be some thing different so you would never be able to see the actuall full game so when it finnaly comes out as compleat it wouldn't ruin the game for you and the only part you would know about is the partyou tested.
some thing like that and maybe that is to long of a time to tes but i was just throwing out ideas when i wrote this