Fujifilm released firmware 1.03 for the X-T4 the other day and we now know for sure that it improves how the X-T4 automatically adjusts exposure. Above you can see a good example of the ways in which auto exposure has improved.
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Fujifilm X-T4: B&H Photo / Amazon / Adorama
VG-XT4 Vertical Battery Grip: B&H Photo / Amazon / Adorama
NP-W235 Battery: B&H Photo / Amazon / Adorama
Fujifilm BC-W235 Dual Battery Charger: B&H Photo / Amazon / Adorama