In that case, it would also be possible to downgrade parts of the console as we saw fit to create the ideal exploitable environment to boot from. For starters, as I'm sure Hykem won't have time to make a stable webkit exploit for 5.4/5.5, it should be easy enough to just downgrade the browser using an unstable exploit for the time being, or permanently, depending on the necessity of a stable new webkit exploit I guess. Of course, it would also be possible to go back to 5.0.0 and use the "easier" IOSU exploit as well, depending on if that gets released or not. Lots of options here for sure. Anyway, having the best booting environment should be a priority to achieve after the release of an emunand tool, so not an immediate one by any means. Still, there might be exploits in older versions of the quickboot menu that can be used for boot-time code injection, so it's probably worth looking into anyway.