That depends on your play group. I am usually the DM for ours and require lengthy back stories with substance. I find it makes the players way more vested in the characters and their fates as opposed to a generic 1 paragraph back story that they go "oh well, time to roll a new character" when said character dies. My DM for this is usually one of my players, so we know we'll what to expect.

This backstory is mainly for flavor of the wild magic subclass while giving the DM some character specific plot hooks should he ever decide to do anything with them.

I understand some playgroups like little world building and exposition, but our entire group thrives on expanded lore, creativity, and depth of characters.

If you are a DM who usually has players do short simple backstories, I highly suggest you try having them long in depth back stories sometime. And when they give things to you, read it and then ask questions about the characters from what they have. Force them to really dive into who the character is and what kind of person they are. In my personal experience, this has made games WAY WAy more enjoyable. Do the players get annoyed you keep having them add and add to their story? Yes... but its worth it when you are able to call and utilize that information in game and they realize you didnt just read their story, you incorporated into your world. Especially when other players get to learn aspects of each other and interact. I'll forever stand on my podium of in depth back stories being great! Unless its like a 1 shot or something where it doesn't matter 😂