some people say they just downgrade str8 from 9.9, but ive read around that if you upgrade to 10.3 first there is less of a chance of a brick or frankenfirmware because 9.9 fw is sketchy to downgrade from.
btw i feel this a good time to remind you guys that sea of thieves was made by rare, who also made DKC1-3 and DK64, alongside banjo kazooie and conker's bad fur day