Novel concept but still some details to iron-out. Perhaps a multi-sig could supplant or merge with marriages, as a more convenient "commitment transaction".

Marriages often end-up with a huge cost outlay with engagement rings, ceremonies, honeymoons, anniversaries & expensive divorces to deter casual arrangements. Multi-sig ceremonies could be a much more simplistic financial arrangement in future decades. Even if the concept of marriage is aspirational and a beautiful part of life.

If this becomes mainstream, I hope for @jimmysong to be my vicar and to officiate my multi-sig ceremony 🤣