It's less likely, not more - both due to copyright law and failure to copy files from obsolete formats to newer ones is making it much more likely that information is being lost, not preserved. Current US copyright law is preventing most things created after 1922 from being copied and digitized; lifespan US copyright is now life of the author plus 70 years, and when the "author" is a corporation (ahem, Disney) that "lifespan" is nearly endless. "Public Domain" at this point, with very few exceptions, only covers works before Jan. 1, 1923. One of the very reasons books written in the last century are hard to find is due to the current length of copyright protections. The DMCA makes things even worse. The Entertainment Software Association (along with the RIA & MPAA) has been aggressive in fighting any exceptions to the DMCA, even for the purpose of preservation.
The story of the book Barracoon is good example of excessive copyright restrictions killing publication: https://www.washingtonpost.com/news/posteverything/wp/2018/05/07/how-copyright-law-hides-work-like-zora-neale-hurstons-new-book-from-the-public/?noredirect=on&utm_term=.34cc2cd929d1