We have to be very careful with GAS, it is not the best solution to protect our bank account. Why do I want a 26mm lens (in my case for my D610) when I have an excellent 24mm f2.8?
It really makes no sense to me.
Fortunately, I have natural protection against GAS. It's called "Available Finances." I have to allow money for food, taxes, gasoline, and ice cream.