TrueNAS Enterprise will stay on TrueNAS 13.0
TrueNAS 13.3 will not be available for Enterprise system upgrades. Enterprise users need a battle-tested system and don’t leverage the Jails or VM compatibility. Staying on 13.0-U6 is the safer and well-supported path for mission-critical storage needs.
TrueNAS Enterprise customers will always be fully supported for the duration of their support contract regardless of their software version. TrueNAS 13.0 will continue to be supported, and hotfixes will be provided for critical bugs or security issues. Staying on 13.0-U6 is often the easy and wise decision for production systems.
The question for the faithful CORE users is whether the enterprise customers will ask hard and loud enough for a TrueNAS Enterprise 14.x to update their 13.0-U6 systems.