Not enough "oomph" usually means processing power. However, your screenshot reflects memory constraints. I run VMs and multiple tabs similar to you without a hi

Not enough "oomph" usually means processing power. However, your screenshot reflects memory constraints. I run VMs and multiple tabs similar to you without a hiccup. I think most developers (myself included) tend to go with the 8 GB of RAM though when getting the MBA. You only have 4 GB. That's the issue here. :)