If we live long enough, the likelihood is high that we'll need some help from others, family, friends or professionals.
We need to look at our living "systems" from the viewpoint of these helpers.
Some kitchens are so clearly arranged that you could just step in and get to work, and some seem to dare you to try.
How many "systems" does it take to maintain a home? Bathroom cleaning, first aid, daily meds, pet care, plant care, heat and a/c...
Make it easy for your helpers to help you. They'll be glad to visit and you'll get more for your money.
[Time for a conversation with my wife....!]