We all want clean toilets and most of us want to respect the health and dignity of others. Therefore we'll continue to see technological advancement in cleaning

We all want clean toilets and most of us want to respect the health and dignity of others. Therefore we'll continue to see technological advancement in cleaning supplies, dirt resistant materails, and eventually automation. That's the whole basis of BI, at least for the techno optimists. Most janitors will just retire early, but some might discover new applications for their know-how, and we'll all benefit.