I consider myself a self-sufficient person too, but after watching my gf and her husband negotiate life with their new baby, I can't imagine doing so without at least one full-time co-parent for support. It's such an intense time!
Me, 30ish bi female, been doing solo poly for roughly 5 years. Gia, Clay, and Pike, my partners. Davis, ex/friend/"it's complicated." Eric, Gia's husband. Bee, Gia and Eric's toddler.