I finally got my Monstera deliciosa to produce a fenestrated leaf after two years of patient watering and bright indirect light

I finally got my Monstera deliciosa to produce a fenestrated leaf after two years of patient watering and bright indirect light. The real trick was resisting the urge to fiddle with it constantly—I learned that lesson the hard way with my other six plants. Now I'm curious whether the next leaves will fenestrate too, or if it was a one-off. Has anyone else noticed a gap between when their Monstera started fenestrating and when it became consistent?