The key to really common use of technology is to make it cheap. (Usually, to make it affordable is a middle step along the way.)
This is one of the key problems with health care technology. Cheap, widely-used health care treatments (like ibuprofen for inflammation, aspirin for headaches, tylenol for fever) seem rare, compared to expensive, specialized drugs and surgeries. The quandry is, the development of the drugs is financed by the profits to be made while the drug is still under patent. In the U.S., it is terribly expensive to prove that a drug is both effective and harmless, before a government board will approve it for use. And, based on the terribly expensive lawsuits against companies whose drugs are blamed for harm, the board still lets harmful drugs through, anyway, and the expense of the payouts must be met by profits from those drugs or others made by the same company.
I think the public would be better served if the expenses of development were brought down, by reducing the cost of the testing, and by tort reform which would reduce the lawsuit costs.
If Western countries continue with their expensive ways in medicine, Communist China will replace us in medical technology leadership.
Moved to correct part of forum. This response to Li-fi wasn't on topic as far as I can see but might be interesting enough for its own thread.
And if you don't like Chicken