Switch Firmware 16.0.3 ((new)) -

It sounds like you're referring to the , released in June 2023. While not a major feature update, it's interesting from a security and stability perspective.

16.0.3 was a minor but necessary security stability patch . If you’re on an unpatched Switch (Erista model) and want homebrew, stay away from this — but for regular users, it’s harmless. switch firmware 16.0.3