I would say performance is pretty good in general. As far as technical heavy hitters I can only speak for MKW and Zelda TotK, but both run and look amazing on both docked and handheld modes.
Battery life and Switch 1 backwards compatibility are a mixed bag though. 2ish hours for demanding games is really pushing what I consider acceptable for a portable device and 540p or less on an 8+ inches 1080p display looks like hot garbage. Ironically, the low ceiling of many Switch 1 games makes battery life very good while playing those xD








