FIG standards are explicitly interoperability standards. They make it easy for anyone to jump into a new company or open source project with minimal friction and minimal bikeshedding.
If you or your team don't care about that and want to do something different, there's nothing stopping you. Even the Symfony team, who contributed to these standards and largely follow them, have gone their own way when they thought it was worth the trade-off.
If you or your team don't care about that and want to do something different, there's nothing stopping you. Even the Symfony team, who contributed to these standards and largely follow them, have gone their own way when they thought it was worth the trade-off.