Sony sent out a notice over the weekend reminding certain PlayStation Plus subscribers, as well as others who weren't aware, about changes to free games. The message below was sent out to all emails registered with a PS+ account, basically saying that they would no longer release PS3 or Vita titles as part of the free games system every month, and that PS4 titles would only be on the menu starting in March. Basically meaning those two consoles would no longer be able to receive free games.
As a reminder, after March 8, 2019, the Monthly Games provided to PlayStation Plus members will no longer include PlayStation3 (PS3) or PlayStation Vita (PS Vita) titles. Any PS3 or PS Vita Monthly Games downloaded or previously added to your Download List prior to March 8, 2019, will still remain playable for as long as you remain a PlayStation Plus member. Beyond March 8, 2019, PlayStation Plus Monthly Games will only include PlayStation 4 (PS4) titles. All other features and benefits of the PlayStation Plus service will remain unaffected.
It kinda sucks if you've been holding onto those two consoles, but it only makes sense with Sony clearly working on whatever the PS5 is going to be, and moving forward with the PS4 as the last previous model after it comes out.