I am owner number four. The 3 preceeding owners gave the plant away as it never flowered. So it ended up in my greeenhouse. The trick is that the plant needs maximum light. As you can see a blackout and missing ventilation of fresh air burned 80% of the big plant 2 years ago. Also if I do not pay attention the sunlight quickly burns the spikes so close behind the glass.
But it is not the plant's mistake if there are no flowers.