[dragonwriter]

> The trouble with oral agreements then become determining what is in the oral agreement, after the fact.

Yes, except for the narrow situations where writing is legally required for a contract, the point of a written contract document is not that it is necessary to create a contract but that it is valuable in the event of a dispute as evidence of what the parties actually agreed to.

Determining that an oral agreement existed and what the terms were is an evidence problem.