absolutely loved your post! i had listened to this piece before but didn´t knew the story behind it! it is sad but fascinating, and yes i agree with you:

Even if someone suffers from heartache or sadness, it can be a trigger to create a masterpiece.

and we have the proof right here, such beautiful music came from the wounded heart of Beethoven, and many other artists. Your performance was amazing as always, love to see those hands at work, mesmerizing! you say it was too long? i wish it lasted longer! hehe always a pleasure listening to you play, hugs and blessings! :)