TSMC?

> Their only partnership that stood the test of time is probably Nintendo.

But even then, the original Switch 1 homebrew relied on an oversight in NVIDIA's Tegra chip that blew open the whole platform due to the ability to execute unsigned code. The Switch 1 was actually pretty locked down. Nintendo worked hard on securing it properly, only for it to all be for naught due to their SoC vendor making a massive blunder.

I wish I could have seen what was said in the meetings between the two companies when the first Switch exploit was released, considering it was fully on NVIDIA.