I was discussing this with two different FB groups, one went crazy about it (baby group) but step parenting one had a completely view on it.
In my personal case, as the commitment and life of a married couple is already there, we're only getting married for a ring and a party.
We know we'll be together for life, so we might as well plan/save for something we both want and we have no rush whatsoever.
PS we already have wills and NOK arrangements so we're covered if the worst were to happen in the meantime