2512.1 is solid and have it deployed at multiple customers. I deployed 2603 on GA, but I'm having a ton of issues with it and persistent VMs. Bunch of issues with Client Folder Redirection, agent availability, Teams slimcore optimization causing Teams to crash, etc. Working on Instant Clones in my lab, but having issues with all my persistent VMs (even when deploying brand new VMs, fresh install for everything).