There's an enormous network effect with bug tracking software. If you learned a software as a junior worker at one company, you're likely to choose the same one

There's an enormous network effect with bug tracking software. If you learned a software as a junior worker at one company, you're likely to choose the same one when you're in a more senior position at the next one. Developers move from company to company, and take their knowledge and preferences with them. When you're setting up a new company or department, you're going to pick the program that your team knows. My employer bought an instance of a certain bug tracker because one of our vendors was using it and we needed to keep their data when we changed vendors. A year later, the whole division uses it.