You could be strict and limit this conversation to formal boot camps, but the reality is that this training is happening in a lot of different places.
I've been mentoring a number of our senior support folks on coding, and they've been doing something along the lines of a boot camp. My management finds that support team are able to better understand how things work, attempt to debug things they'd have been afraid of, and ask better questions of software engineers. Support engineers get to do something different and are building skills. They have seen "coders" move quickly through support to the engineering team. Another group manages our tools, but I hope they'll be able to hack on some tools for our team. Some people will stay in support, but it should be less stressful because they can understand how things work better. From a distance you can see how the online communications have changes between the two organizations.
From my past experience in Pharma I know there was similar interest from scientists to learn to code (if they didn't already). I also know that some of the designers working on electronic detailing apps for sales at the time really wanted to learn to code because they had to transition from Flash to HTML 5 and JS.
For these reasons, I think that the make up of coding boot camps may surprise some. A differentiation may be related to where someone is in their career. Someone laid off, or without a job is probably more like to jump to a boot camp than someone who has a job. Quitting to take part in a boot camp is probably a huge jump for people, if they are in the tech sector because they may have more awareness of what is involved, or other means to make the jump to coding.