Description:
After researching on Sony a7iii, I have concluded that Sony a7iii does overheat during extreme condition (Sunny day at 30 C +). Here are my findings:

iphonedo a7iii overheating test:

David Oastler overheating test:

Martin Cheung a7iii overheating test:

Bogdan Nasalean a7iii overheating test: