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I heard that even M3 Air laptops have overheat issues. Is the M4 Air going to be worse?
 
No it's going to be better.
I wouldn't be so certain about that. M4 is fantastic, and I am typing this on an M4 Pro MBP, but if you push the machine then M4 runs hotter than M3 simply because M4 has a higher package TDP and is allowed to run at higher peak wattage. In multiple online reviews M4 MacBook Pros turn on the fan(s) sooner and louder to cool off the chip than M3 MacBook Pros.

In a fanless chassis like the MacBook Air, I would expect M4 to get hotter or thermal throttle sooner than M3 version when the system is under high load. If you're just doing email and browsing the web then neither M3 nor M4 are going to overheat.
 
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"Spring starts on March 20, 2025, and ends on June 20, 2025."
Thanks for the science lesson
 
I wouldn't be so certain about that. M4 is fantastic, and I am typing this on an M4 Pro MBP, but if you push the machine then M4 runs hotter than M3 simply because M4 has a higher package TDP and is allowed to run at higher peak wattage. In multiple online reviews M4 MacBook Pros turn on the fan(s) sooner and louder to cool off the chip than M3 MacBook Pros.

In a fanless chassis like the MacBook Air, I would expect M4 to get hotter or thermal throttle sooner than M3 version when the system is under high load. If you're just doing email and browsing the web then neither M3 nor M4 are going to overheat.
According to rumors there might be improvement with thermal on the MacBook Air m4. Maybe they will adjust the chip or something… but normally it’s going to be better.

+++ M4 can runs higher task ok but it doesn’t mean it’s hotter at the same task than m3 can do.
 
Maybe Apple should spend some of its vast resources (earned from price-gouging its customers with meaningless ‘upgrades’) on a decent camera for this thing. Despite all the hype, MacBook and iPhone cameras are still trash: try making a Zoom call with non-Mac users and be horrified to see how much worse the Mac cameras look: muddy, flat, badly white-balanced, and this is after waiting a decade for 1080p — not that it’s made much difference.

Apple’s lost its way by following the other sheep into the AI pasture. And toadying to the new political regime is going to hurt them badly with their base support — already the share price is suffering. And I for one, as a longtime admirer and user of Apple products, am glad. Tim Cook is a spineless, visionless junk-peddler, regurgitating crap and pandering to shareholders. He’s brought nothing to Apple but hubris.
 
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