At this year's 34c3 hacking presentation, there was a panel that focused on the Switch. Turns out the key to opening up the Switch to homebrew and other backdoor programs comes from Nintendo's use of an off-the-shelf NVIDIA Tegra chip. With the backdoor the chip already provides, all that's needed to run homebrew is version 3.0 firmware and a physical copy of Pokken Tournament DX. You can see the full panel discussing the discoveries above.