One major factor are kickbacks. If you are working in a government or in a large company that can be the main factor for decision. https://investopedia.com/te

One major factor are kickbacks. If you are working in a government or in a large company that can be the main factor for decision. https://investopedia.com/terms/k/kickback.asp https://investopedia.com/terms/k/kickback.asp The other one, is legacy systems. If you are a big bank, migrating away is a big risk, and anyway you make so much profit that it’s better to leave an extra 10M USD license fees in costs untouched, rather than risk destroying the 300M USD in profit. (Add that to the risk that your CTO may get mad because he won’t get his kickback)