Not really since Sony's decline in Japan has nothing to do with Nintendo. It's all self-inflicted, while Sony actively destroyed the monopoly Nintendo had not only in Japan, but also in the US.
No company exists in a vacuum. They compete with each other, especially SIE and Nintendo. They still regard each other as arch rivals. Nintendo still sees SIE as the company that once took their market from them and nearly put them out of business. Remember that the DS and Wii were bold business decisions to do something different because if they didn’t, it was game over for Nintendo. SIE still sees Nintendo as a dinky toy company for children that doesn’t get how to do business in the world of big-boy electronics and computers. (I exaggerated on purpose to make a point. Please don’t accuse me of inflaming because we all know the reality is more complicated.)
For another example of the rivalry, look at how the presenter in the Nintendo Direct was sentimental and emotional on camera about finally getting Final Fantasy VII on a Nintendo system. That is even as a digital only decades late straight port from obsolete hardware.
Next, this thread is about the implications of Playstation’s decline in Japan. That certainly affects other market players. If Coke went into decline, don’t you think that would affect Pepsi?
Towards the beginning of this thread, we talked about how the AAA third party Japanese developers are having trouble recruiting young programmers to work on their AAA IP’s for Playstation. One roadblock is that they have never heard of the IP’s that us old farts grew up on because it now takes so long between iterations of the IP. The other part is that the young programmers either haven‘t heard of or never played a PlayStation. It’s something their dad or uncle might have. They feel no affinity to the AAA JP IP’s and no affinity to PlayStation. They‘d rather work on Monster Hunter as they regard it the way us oldsters regard Castlevania and Final Fantasy.
Playstation now gets more revenue from PSN subscriptions and MTX than software sales. They still need compelling software to get customers to buy the hardware so they can buy PSN and MTX. They still compete for key software titles as well as customers’ time and money. PlayStation still moneyhats Final Fantasy and moneyhatted years times exclusivity with Persona 5. During the PS4’s peak, they didn’t have to do much else as the WiiU was a bomb and the third parties still had hope that it would be 2004 all over again if they just supplied the software.
The AAA JP third parties have been looking at the software sales on the Switch since it was clear it was going to be a hit in 2018. Square ported Nier Automata because they saw that Astral Chain sold well. The third parties noticed that Octopath Traveler sold well. They have noticed that a years’ late port of Persona 5 has sold well, The Witcher 3 sold well, Skyrim sold well, and on and on.
They didn’t even bother to look hard at what sold on Wii, DS, 3DS, or WiiU because Sony’s decline in Japan was not yet so terminal that they had no choice but to look at alternatives. They are looking at the Switch and Switch 2 because they no longer have any alternative.
Aren‘t those consequences of PlayStation’s decline in Japan?