I would rather have VM labs, but I have been pretty ambivalent about the in-browser labs. Found a huge PITA tonight, though. The browser key bindings always have priority. In the lab, I was using nano and wanted to search for something. So, I hit CTRL-W (Where Is) and poof the lab disappeared. Apparently, CTRL-W is the shortcut to close the current window. Oops. I guess that is a feature of nano that just can’t be used.