This is an example of some of the problems with closed formats. This article shows that a user who wrote some software which can convert the files from one type of software (endnote) to another format so that the owner of the files (ie. “former” endnote users) can continue to access their data using an alternative.
However the original software says essentially “all your data belong to us”.. Not good. Imagine if you used MS Word, and all your word docs were owned by MS, and you could not use any software other than MS Word to read them.. It’s criminal. Software is owned by the companies who create it, fine, but if I use software to make something, that something is mine and I should be able to do whatever I want with it..