The article Ha posted really is refering to remarriages later in life and the importance of considering the financial implications that the remarriage might have on estate planning, pensions, SS, alimony, future obligations of the new spouse, etc. It wasn't so much a commentary on the lovey-dovey aspect of being married or not as it is a warning to do your homework before re-establishing legal obligations and commitments to a second spouse.
As stated before, DW and I have been together since we were teens and married at 22. We've climbed a lot of walls together and both feel fortunate to have each other as partners in living life as we wanted, raising a family and now enjoying FIRE.
Despite having enjoyed this marriage so much, I can't imagine, at this stage of life, wanting to start another one if DW was gone. The legal implications and complications would be a total turnoff for me. I'm sure I'd eventually enjoy having a "special friend" but the relationship would have to revolve around good times and shared interests, not formalized, legal commitments. My current extended family would always come first and I'd expect her current extended family to be first for her as well. And finances would never co-mingle.
I watched my dad cope with this after my mother died and currently have 2 life long friends who are dating in their 60's, one due to divorce and one due to death of his spouse. All had or have feelings similar to mine and it seems to be absolutely no problem to women (in general) that marriage will not be part of the equation, although love, friendship and a lot of shared good times will be.