I'm not sure what OSHA or Insurance requires but my point is this. If it is required to have the safety devices on the equipment why shouldn't they be on there. It's not fair to other companies that spend the money and follow the law if a few companies refuse to do it. It's also not fair to the employees. To say it's common practice may be true for home and or fly by night shops but that don't make it right.
As for how long it takes to swap the safety devices. You must have a older saw because most saws today have the quick change devices. Mine does and they change in 20-30 seconds.
As I said if it's required then any boss worth working for will follow the rules. Those who don't should not be in buisness.
With all do respect I don't think you know what you are talking about. Most "real" shops, not fly by nighters don't use it. They keep it close to the saws in case OSHA shows up but they don't use them. I have worked in high end, low end and super high end shops with annual sales from $150,000 - millions!
The shop I work for has 4 saw stops so they are safety minded.
As for the "if it is required any boss worth working for will follow the rules" comment obviously shows that you don't know what OSHA requires!! It is not even possible to stay in line with all of OSHA's laws!!
I have a brand new Bosch job site saw it swaps out really fast, I just don't like having to change it every time I switch operations, which is about every other cut.
I am VERY safe but I don't like the blade guards!! I use push sticks exclusivley!!