No door? Watch out.

When Doors Are Missing...

...it's easy to overlook how unfriendly they would be.

When a door has been removed, check carefully
where the door will swing when it is in place.
(Better Houses, Better Living p.123)

Here they removed one door so you wouldn't see how the two will bang together.

With missing doors it's not so obvious that they would swing right across clothes in these closets.

With the door gone, you don't see the sidle-toilet problem.