I think Sony is definitely capable of producing a better IS mechanism, but it has other design priorities.
For a FF Mirrorless to have an equivalent or better IS than eg. the OM 1 or EM1 with 7 stops, the IS mechanism may be much larger and make the camera body much larger. Sony probably do not want to design something like the Canon R3 (8 stops) but huge and weigh about 1100g!!!
For a FF Mirrorless to have an equivalent or better IS than eg. the OM 1 or EM1 with 7 stops, the IS mechanism may be much larger and make the camera body much larger. Sony probably do not want to design something like the Canon R3 (8 stops) but huge and weigh about 1100g!!!
That said even among Japanese companies they guard their secrets and do not share their technology freely. For instance turning around the story why could not Sony have designed a better image stabilising mechanism with the help or co- operation of Olympus?