Smash has never had good online. It doesn't seem like Ultimate's online is any better than Wii U's. I suppose using ethernet on Switch OLED's dock or an adapter would improve things, but the connections should be better even with Wi-Fi like most use.
Because of that, Smash. 5-8 Player Smash is a hoot. I remember hours of fun with that in Smash for Wii U.
The Smash games with local multiplayer can't be beat, and I loved playing the Subspace Emissary with my brothers as we tagged in and out with the 2-player limit.
Lifetime Sales Predictions
Switch: 161 million (was 73 million, then 96 million, then 113 million, then 125 million, then 144 million, then 151 million, then 156 million)
PS5: 115 million (was 105 million) Xbox Series S/X: 48 million (was 60 million, then 67 million, then 57 million)
PS4: 120 mil (was 100 then 130 million, then 122 million) Xbox One: 51 mil (was 50 then 55 mil)
3DS: 75.5 mil (was 73, then 77 million)
"Let go your earthly tether, enter the void, empty and become wind." - Guru Laghima