Tutorials and guides on how to set up an outdated setup are not allowed. This includes but is not limited to setting up menuhax, arm9loaderhax, rxTools, CakesFW, and other similar long-superseded setups. Tutorials on how to downgrade the system version without a reason (such as on 3DS) also counts as a possibly dangerous setup with no benefit. Whether or not a guide is "outdated" is usually determined on a case-by-case basis, but we understand it to be (in the case of 3DS) anything that does not work on a boot9strap setup.