First fenestration in 17 years!!

Backstory, this plant is at least 20 years old and I believe a good bit older. It was my grandmother’s and kept at work. I don’t remember it ever having fenestrations, but I could be wrong. She passed, the plant was left in the shop window, it froze badly and lost 90% of itself (probably 15-20’ long before freezing). I brought it home then, 18 years ago this fall, and it has been in what I now know are non ideal conditions since. Recently got a grow light and holy shitballs I have my first fenestrated leaf!!!

Set up is still not ideal, I’m doing some light measurements throughout the house and will move accordingly along with something for the poor thing to climb. But she is at least happy enough to put out a fenestrated leaf!!