for instance using washing soap meant for dishes for home cleaning as well. what if this becomes official to help families save cost, manufacturing items with multipurpose.
Will you purchase items with multipurpose?
maybe you have not observed that at present, that is what is currently happening because people no longer make use of things for a single purpose. for instance in most part of my state, people rent a one bedroom flat and make use of it as official home and at the same time still make use of it for business purpose. using soap both for the purpose of bathing and washing is not even an economic issue as it is what has been in use for a long time most developing nation.
the issue with producing one item that serves multiple function is that the tendency of it being inferior is what is going to be the issue because specialization will always beat doing general purpose equipment that solves multipurpose function.