I'm only a casual speedsolver (main interest is non-WCA puzzles), so I'm not up to date with the latest models either. I think I'm using a MoYu RS3M 2020 or 2021. I just ordered a couple of magnetic Yuxin Little Magics, as I liked the feeling of the non-magnetic one.
Is it bluetooth connection with a phone? I think I have an old Gan smart cube (maybe their first one) and I didn't use it much because the connection kept dropping and was sluggish.
I use it both on my phone (cubestation app) as well as on a browser on my macbook (cstimer and cubeast). Never had any issues with connectivity on either, and I have over 5000 solves combined.