The world has changed. Waiting for our laws and customs and attitudes to catch up IMO is foolish for whichever group has lost power.
The best approach for anyone who might be concerned about loss is fairly clear I think. Still, many will not see this or will value other aspects over increased money safety when going into a relationship.
Life seems to require a fair amount of pain and risk overall, and how much anyone wishes to try to mitigate this depends on so many things. Also, the rules change over time. People in my age group married in a different legal and behavioral and public-attitudes regime, and few if any of us could have foreseen today's conditions.
One possible curve ball for the near future might involve broadening and re-defining "palimony". It may happen that you are not married, but if you live together, or whatever else might get pushed through, and shazam, there goes a bit chunk of your money if you want to exit.
Some posters have stressed that marriage is a contract. I guess, but the terms are always open to change and these changes will be applied to those who acted in accordance with the old "contract".
Ha