I am thinking of one particular journal that had a problem with historical reference libraries under RefMan that all broke after the EndNote migration. A library of thousands of purchased articles, including pivotal trials that are commonly referenced, essentially became inaccessible after RefMan was purchased by EndNote. I believe EndNote also remotely inactivated the software and engaged in some other chicanery. That experience turned me off of reference manager software. Maybe Zotero has gotten it right this time! I don't know. I just know that few things last in tech and least of all libraries of data housed in software that may or may not be updated or supported by future systems.