Apparently PS+ FF VII Remake won't be eligible for a free upgrade to PS5, but seeing as that's a year old game that was one of the best of 2020 that's a great get. Plus Maquette, which is a new release, and Remnant from the Ashes, which is well regarded.
Plus Soulstorm is launching on PS+ in April. That means that for 4 out of 5 months we're seeing major (though not necessarily full price games) games launch on the service, and a lot of other really good stuff in there too, like Control and Maneater.
This is a murderer's row lineup for a $60 a year service, and it's following several months of really really good games. My hat's off to Sony here. I have criticized them for the PlayStation 4 collection requiring a PS5 (which are impossible to get) and the PS5 only version of games that are also on PS4, but the overall value is tremendous, and PS4 owners who don't have a PS5 yet but do have PS+ are building an outstanding library for when they get a PS5.