The PS3 and Vita stores are both still running and accessible through those respective platforms. Sony only de-listed PS3 and Vita content from the PS Store website. I think the reason was to cut down on clutter in the storefront to make room for the addition of PS5 content.
http://www.youtube.com/watch?v=F1gWECYYOSo
Please Watch/Share this video so it gets shown in Hollywood.