Agreed. But, in my case I couldn't use grayscale without this. I need colour many times a day for work. So, this is actually what made greyscale possibly at al

Agreed. But, in my case I couldn't use grayscale without this. I need colour many times a day for work. So, this is actually what made greyscale possibly at all. I do agree you have to watch for leaving it off though. If you find yourself switching it off you can set a daily reminder until the habit sticks.