Some machine shops are disgraceful. Dirty filthy things with little apparent care for the work environment or the machine. So it is quite obvious there will be some employers who won't look at safety because its just not in their DNA.
On the other hand there are other employers where you could eat your lunch off their machine shop floor and safety is just part of their overall approach to the business and machines.
Often the issues with machinery is that the original purchase is capital intensive. So people hang onto them for as long as possible. Bringing them up to current safety expectations / standards is also expensive so it, in part became a cost issue.
Cost can be a major issue, with business costs increasing every year and customer expectations on price also adding pressure along with international competition. Margins get squeezed and something has to give. So I suspect there are also some employers who would like to take their safety more seriously but the cost of upgrading safety, when put aside the ongoing viability of a business and all the responsibilities to staff etc that entails is a major consideration.
However, if we like it or not increases in Minimum Wage have a good flow on affect to machinery. As it becomes more expensive to hire a machine operator a replacement piece of kit, with modern safety features and greater efficiency becomes more attractive. To the point now that you can retire two machines and operators and replace with one machine and operator - often with an operator needing even less skill.