In 2017 the Tegra X1 was still a top performer for graphics processing. Its true that the X1 was originally released in 2015, but it was still going toe to toe with the best SOC's in 2017 when it came to graphics. The top of the line Snapdragon SOC in 2017 started to edge out the Tegra X1, but just barely, and those were only used in devices that were much more expensive than Switch. So when someone makes the claim that the X1 was outdated when Switch launched in 2017, ask them to provide a benchmark from March 2017 or older that shows the Tegra X1 getting bested in a graphics rendering benchmark. When people make these claims, they typically make them boldly, insinuating that not only was the Tegra X1 outdated, but was outperformed by competing SOC's by a significant margin, something that didn't really start materializing for 2-3 years after Switch released.
Fast forward to now with the T239, you can argue that its dated technology as well, but in practice its going to be a top performer in the mobile SOC market when it releases later this year. So while it is technically factual to say its dated tech because the GPU cores are Ampere based and the Arm A78 CPU cores released all the way back in 2020, they will still by competitive in 2024. Assuming T239 is on 4N, it will be about as impressive as the Tegra X1 was back in 2015 when it released.
Nintendo's president recently talked about the longer than normal life cycle with Switch being tied to the software now being unified onto one platform, no longer split between portable and home console. This tells me that Nintendo's plan going forward will be to have generations that do last 7-8 years before releasing a successor. So when we are looking as some potentially choices Nintendo has made as it pertains to SNG, we have to evaluated it with the mindset that Nintendo plans on this new hardware being their primary platform for the next 8 years. Its reasonable to believe this will play into making some choices based on the long term health of the platform rather than choices that save a few dollars in 2024 but result in performance complications down the road. With the tech industry, you also have to consider what will be more mainstream a few years down the road. Going with two 6GB modules is probably cheaper than two 8GB modules, but if things are trending towards phones and tablets using 8GB modules, then that we may see the cost of those come down significantly and 6GB modules could end up being phased out before SNG has reached the end of its life cycle. To summarize, there are choices that may seem a bit premium in 2024 that will pay dividends in a few years when those parts are now used in millions and millions of low cost phones and tablets.