Both my TCL Roku TVs, Stick 3821 and Ultra 4800 have all updates to Roku OS 11. Everything working across the board. No channel issues, no connection issues, no sound issues, no picture issues. On my TCL Roku TV with Roku Wireless Speakers and Sub I love the new sound options. Have it set to movie mode now. Crazy thing is a check connection test on the same tv jumped from 180 Mbps to 250 Mbps. I have 500 Mbps internet. Sticks and Ultra around 150-170 Mbps. All on 5.0 GHz. Currently watching Halo on Paramount+.