In the book Twilight Sparkle and the Crystal Heart Spell (by G M Berrow), Cadance was originally an orphaned Pegasus who was raised by an Earth Pony couple. When she helped a hard-hearted, reclusive enchantress to learn the magic of love, she ascended into an Alicorn state and was taken under Celestia's wing as her adopted niece.
Princess addiction? No wonder, They represent the excellence, arÍte, the values that we lack and pursue or want to experience from the others. Among chaos and confusion these values shine bright as examples to follow.
It's truly funny how this show, its characters and of course the creative fandom trigger unexpected yet invigorating thoughts
Everyone is making the Baby Cadence call, but timeline works better if that's the mysterious not-yet-seen Skyla. Plus, Baby Cady seemed to have all-pink wings until adulthood, whereas Skyla appropriately has purple-wings from (at least) fillyhood.
I also worry about my princess addiction, so I hear you.