For a house to become a home it needs to suit the lifestyles of the inhabitants.
The one size fits all style of building McMansions with a bathroom for everyone and “built for resale” shouldn’t be the only approach to building a home. A well designed home will cater to occupants needs on a case-by-case basis. And remember if you are comfortable in your house and design in special features this will stand out in a market full of almost identical “built for resale” houses should you decide to sell.
A custom liveble design can often be more affordable than a cookie cutter approach. With this approach you prioritize how you use space in your current home and then design this in to the new one or to any renovations.