This is not restricted to Adobe Lightroom. Many other companies are ignoring older versions and in some cases the file formats have been changed to force people

This is not restricted to Adobe Lightroom. Many other companies are ignoring older versions and in some cases the file formats have been changed to force people to update. Symptoms are different but root cause is similar. I have an older version of Sketch. Due to my use case, not a designer, I have no need to pay them actually. Lately I needed to use it, and none of the new templates work making my paid version of Sketch useless. At least my old version of Acrobat still works with new and old PDFs.