Partly because it is hard to operate in an economy that is far too nimble. One of the reasons that it is hard to sell to a large businesses as a small business

Partly because it is hard to operate in an economy that is far too nimble. One of the reasons that it is hard to sell to a large businesses as a small business is that it is quite likely that you will go out of business - and that will cost them a lot of time and money to reconfigure if that happens. Most components designed to be included in a larger product for sale will be available from another manufacturer, aka "second source". This is in case the first company goes out of business. Unfortunately, this practice does not seem to have made it to the software world, and so when a company goes out of business, your existing working solution no longer exists, and you will have to scramble to find another one (or go out of business yourself, if you depended on that functionality).