On one hand, the Switch 2 really needed a better way to attach the joycons without being so loose and bendy.
But on the other hand, I was kinda hoping I could use the joycons I've bought over the years on the Switch 2, and if it's a totally new attachment mechanism, I doubt they'll work. Maybe wirelessly they can work, but probably not attachable.
Glad I didn't spend $70+ recently on a pair of high end third party joycons I saw that looked really good. I already bough those hall effect Gamecube style ones and was sadly disappointed with (not actually comfortable to hold when attached, and the buttons, especially the A button, we're reeeeally mushy).
Hopefully 3rd party joycon devs are able to make Switch 2 versions of their good Switch models quickly. I feel like it took to near the end of the Switches life before we finally started getting great joycon alternatives with all the features (gyro, rumble, wireless, AND good feeling joysticks and buttons).