One of the Switch's biggest selling points, is the fact that you can pass one of its detachable Joy-Con controllers to a friend for multiplayer games, not just at home, but also anywhere using the built-in kickstand. Many games leverage this feature from 1v1 fighters, to party games, racers, co-op games, etc.

Nintendo really wants people to use this feature, hence why every single marketing material involves 2-player Joy-Con. But how often do you actually use this feature? I find it comes in handy when playing with my sister, but I don't have many friends in my area, so I'm limited in who I can play with.

Don't play much multiplayer, but I did use the feature to play Snipperclips with my brother.

Use it all the time for local Mariokart multiplayer. I think the way that Nintendo implemented the joycons was genius. Allows for so many different types of play.

Really only used it for Sonic Mania

To play 1-2 Switch, and already shared the joy with Snipperclips, PuyoPuyo Tetris, Spelunker Party, Mario&Rabbids...
and now I can do it with Sonic Mania Plus too

Me and gf played 1-2 Switch with her brother while being outside in the garden grilling meat and drinking beer.  Afterwards we went in and played Street Fighter and Bomberman. Good times. Also, we played Snipperclips and Kirby from start t finish exclusively in multiplayer mode.

Never. I don't even use mine, i just use the pro controller.

Since my kids got their own Switches, never. Also everyone I play Mario Kart with at work has their own Switch.

Most nights. My fiance loves Overcooked, and we've been playing 2 since it released, have 5+ hours already

Never, I bought adapters so my friends can use PS4 controllers while I use both joycons. Which is why I'm pissed that Mario Party only supports joycons and not pro controllers.