In the past month i was also considering to buy a Wii to play some games with friends, but i waited to see if the switch 2 could be worth it. Now i'm seriously considering the Wii.
You will never run out of games to play with a softmodded Wii plus a massive SD card. Make sure your Wii has the correct ports and get some Gamecube controllers too.
It's way easier to use Dolphin. You haven't truly lived until you've played Mario Kart Wii in 4k HDR :) They make USB powered sensor bars. Wiimotes connect over Bluetooth, you just need to get a BT adapter that is compatible (many chipsets are finicky with Wiimotes).