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This was taken with
>X-T10, 23mm at 1.4, 1/55, ISO 400
As you can see, the ISO is low, and this was done on an APS-C body without IBIS.
IBIS is just a gimmick. I don't know how marketing from M43 has gotten so good that it's convinced people that they NEED IBIS to take low-light photos while keeping ISOs low.