I've been using K2.5 with OpenCode to do code assessments/fixes and Opus 4.5 with CC to check the work, and so far so good. Very impressed with it so far, but I don't feel comfortable canceling my Claude subscription just yet. Haven't tried it on large feature implementations.
I came here to point out the Redux course by Dan Abramov on Egghead.io as well. I believe it's free. It's amazing how easy Dan makes it seem. It was a light bulb moment for me and finally made me understand the importance of immutability behind the React philosophy.
I have an HP Folio9470m that is running Ubuntu 14.04 like a champ. These days I use it more frequently than my Macbook Pro, especially for Docker related stuff.