If you mean letting public goods be run with a profit incentive for the purpose of increasing efficiency or such, I think what you'll find every time is that the service shifts focus to the median user and disregards fringe cases like users with disabilities, remote areas, etc. I would also expect material quality to degrade as those with cheaper up-front costs would be valued over expensive durable ones.

that’s not the kind of profit of which i spoke. but ok!