I`m almost sure it is.
PS4Pro have been 20% of PS sales since launch, so if we say that since release PS4 sold 70M that means 16M PS4Pro which is more than several systems done in total. Also this gen will have 7 years duration even when the release consoles were smaller upgrades from gen 7. PS4 SW sale is near passing PS2 with a lot less time and HW sold. So all the aspects we can look at show it likely been sucessful. And considering X1X sold even more relative to base console and gave braging rights It probably is considered sucessful.
duduspace11 "Well, since we are estimating costs, Pokemon Red/Blue did cost Nintendo about $50m to make back in 1996"
Mr Puggsly: "Hehe, I said good profit. You said big profit. Frankly, not losing money is what I meant by good. Don't get hung up on semantics"
Azzanation: "PS5 wouldn't sold out at launch without scalpers."