I agree, it's probably some variant of the Gamecube + Wavebird. Small, powerful (for the time), well built, ergonomic, bullet-proof.
I loved the Dreamcast as a console but I think the hardware was only average - the base unit was fine but bland-looking & noisy loading some games. The pad was fairly poor ergonomically - the sides needed to be slanted in a bit.
It's too early to really call but I think the switch could be up there. I play it a lot in handheld mode & a lot in docked mode (never really in tabletop mode) & it really doesn't feel signiifcantly compromised in either configuration. Strangely unlike the Dreamcast pad, the joy-cons in grip are very comfortable ven though they don't slant in - maybe the smaller overall size helps.