The argument that Nintendo needs to release new hardware soon to continue getting ports is ultimately a flawed one because firstly third party ports aren't what is selling the system, and secondly the sooner they release a new system, the less capable it will be of getting next gen ports. Better to wait until 2023/2024 when it can be to PS5/XSX what Switch 1 was to PS4/Xbone.
You misunderstood the point of my post. I am not saying they need multiplats or ports. I'm showing how a dev, with professional knowledge about game making, explains a problem when a platform becomes too outdated. I posted it to support the idea that, the bigger the gap, the harder it is to support a seamless delivery. It was in answer to your last post.
No flaw in it sorry.