An update for SX OS is inevitable, with Team Xecuter sending out test units of their upcoming SX Core and Lite modchips. And it looks like we can get an idea of what that impending update brings to the table, as the update has seemingly leaked prior to its official release. As of right now, v3.0.0 is only useful to the limited users who have the new Core or Lite chips, but regardless, scene member Hexkyz has made note of some of the finer details for those interested. According to them, this update isn't a feature-focused one, and primarily exists to incorporate the new Mariko and Switch Lite units as part of devices that SX OS can boot on. Hexkyz explains these changes further in a chain of Twitter posts seen below.
On the very first boot the bootloader will attempt to update the modchip from version 1.0 to 1.1. Update firmware is stored encrypted inside the bootloader and is likely meant to patch a handful of vulnerabilities and broken code already identified.— Mike Heskin (@hexkyz) May 30, 2020
The initial stages focus mostly on DRM and clear out all keyslots (except keyslot number 6) that were filled by the bootrom as a way to block any other third party from obtaining Mariko keys using the modchip. This is, however, ineffective.— Mike Heskin (@hexkyz) May 30, 2020