I wonder why car manufacturers don't operate like that. They might add a number to the model (e.g. "Golf IV"), but it will always be advertised as "The new VW Golf".
What would've happened if Nintendo simply would've advertised "The new Nintendo Switch"?
Never thought about that, but now it's an interesting thought experiment.
In the world of cars, industrial design is the version number. Beyond that, VW just wants to sell their latest Golf to whomever is buying a new hatchback today. End of strategy.
Numbering helps sell electronics because it makes it clear that your old phone/console is old and "needs" upgrading. It's also critical for selling software exclusive to a certain hardware generation.
Funny that you used that symbol, as it would have been a fantastically bad choice for clarity in product naming. I'm going to assume that you're German speaking and think of it as meaning "average".
In my head it would have been the "Playstation Island", while for most of the world it would probably have been the "Playstation Empty Set".
Fortunately while Squarenix is still important to Playtstation (and Tetsuya Nomura to Squarenix), it's not the juggernaut it once was in the early 2000.
(for those who don't get it: Tetsuya Nomura is a director at Squarenix and known (amongst other) for its Kingdom Heart series who ends up with word salad title such as "Kingdom Hearts HD 2.8 Final Chapter Prologue" or "Kingdom Hearts 358/2 Days")
As an engineer and a consumer / customer, I simply cannot understand why there's a need to complicate things.
You have a Thing, right? It sells, right? You develop the next Thing? Great! Call it Thing 2. Instant success.