A question for the extended bf'ers among us!

If your LO was a wee boob-junkie, when did the nursing to start to slow down and solids take over as the primary source of nutrition?

Miss A is 14.5 months old and still nursing 8-10 times a day (including 1-2 MOTN sessions) and whilst she eats a wide variety of foods, she doesn't eat a huge quantity. I have no immediate plans to wean but I am wondering if there is going to come a time when I need to start reducing the amount of breastmilk she received in order to up her solids. We have no concerns with regards to her weight or development so I'm asking more out of curiosity than anything

Thanks in advance!