At 63, my TDEE for my lifestyle/age gives me a little under 2000 calories per day. (according to the fitgirls!!)
I KNOW I would not lose weight on that. I have also dieted successfully before, so my body's used to it. In fact, I would gain!
I average a successful weight loss of 1/2lb per week on 5 2 of 500 cals on a fast day and 1200/1300 on a feast day. I have bags of energy, am self employed (I have a successful food business) and enjoy feeling well and slimmer! I also enjoy probably the most nutritious diet I have ever had!
Do you think you need fewer daily calories as you get older, or is it just me?