I never said Nintendo is dead.
No, it's business fundamentals 101.
Contrary to what brainrot fanboys think, game companies are a business and the AAA game budgets and acquisitions are super expensive investments that need to be recouped and have a certain profitability or at least sustainability asap.
And when a big corportation makes a big acquisition it's because they want to have the revenue and profit of that company on top of the one they already have, and create synergies between the acquired one and what they already have to grow the revenue and profit the acquired company generates.
In case of gaming, normally means help them giving them new better/bigger funding, marketing channels, internal services and support, plus access to more revenue channels, like helping them to better access new platforms, countries, stores or user demographics.
We're in times where AAA budgets take a few hundreds of millions, and big acquisitions cost several billions. So to recoup this selling games for a single platform isn't enough, so all big AAA publishers (including MS and Sony) keep expanding to multiplatform to grow and improve their business and making it more sustainable and less risky.