Level 0 isn't an option so I didn't answer the poll. I start with a level 0 funnel based on rules from an older Adventurer's League adventure plus the funnel concept from DCC. I really like playing through the zero to hero. I also like to establish stakes with early PC death in a way that doesn't take any player out of the combat or game. Even thoughout a campaign all players have backup characters. Some players rotate characters, tactically selecting characters for specific missions/adventures. Other players favor one and just have the backups "just in case."