Ogg Tarkin predates Theora and tried some completely new ideas in a time when digital video wasn't as ubiquitous (and so there wasn't as much incentive to keep

Ogg Tarkin predates Theora and tried some completely new ideas in a time when digital video wasn't as ubiquitous (and so there wasn't as much incentive to keep going when problems arose). Tarkin also suffered from the patent minefield everybody else put up (so they couldn't go for the obvious solutions because these were already locked down for another 15 years)