You got your answer in your question: "webdev". If you use After Effects it's recommended to allow it 8GB of ram so you have 8 left, your browser takes 3 to 5GB

You got your answer in your question: "webdev". If you use After Effects it's recommended to allow it 8GB of ram so you have 8 left, your browser takes 3 to 5GB, you now have 3 to 5 left but usually you have photoshop that needs to be running too so remove 2GB and now you are really tight on memory.