I am currently working with a rMBP with 4gb RAM with Photoshop CC 2014 installed since it was released. I use it to make layouts for web sites and apps. First I did not think it would make so much difference compared to the previous version, but then I began to notice some sluggish, so I decide to make a test. I installed Photoshop CC again (the previous version) and compared to the new one, opened the same files (about 5 PSDs) and checked Activity Monitor. To my surprise, the CC 2014 was using 2gb RAM while the CC was using just 800mb! Since memory is a concern (4gb ram) and it cannot be upgraded, I decided to go back to Photoshop CC. I've been working with it for about a day and I did not miss any feature so far. In your opinion, am I missing something really important from CC 2014? What Photoshop version do you usually use?