Yesterday Adobe has published in its blog an announcement that states that only two most recent versions of Creative Cloud products (like Photoshop, Lightroom) will be available for download.
That means for example that they will probably delete software download of perpetual licence versions - up to Lightroom v6 and up to Photoshop CS6.
Adobe push for the subscription-only model keeps on.
May 14th update: Adobe is notifying some users that "they are no longer licensed to use old versions", probably some third party licences used in Adobe's products have expired.