If R&D for the chipset is gearing up now, a 2023 release for Switch 2 seems likely.
Probably been in developement for along while, this is likely just to help get it accross the finish line earlier.
Hire more people.
Necro-bump this 2020: http://gamrconnect.vgchartz.com/thread.php?id=229249
Bumb in 2021: http://gamrconnect.vgchartz.com/post.php?id=9047071