I am a little confused by the reasoning here. Is battery life your only consideration at all? Are there any other criteria which influence your choice?
It seems like a shame to jump ship on an entire ecosystem solely because your current machine has disappointing battery life.
I recently got a machine with the new Intel 358H and the B390 iGPU. I haven’t used it a ton yet, but it seems like it gets around 8-10 hours battery life on normal web browsing/productivity tasks in my experience, and while not as powerful as an RTX 4060 (Most benchmarks place the B390 somewhere between a 3050 and 4050), I imagine would be serviceable for editing and coding.
It is an HP Omnibook 7, model 16T-BH000. Mine is 16", but it also comes in a 14" model called 14T-HG000 with the same 300 series processors if that is your preferred size.
It has an aluminum chassis, and I got mine configured with a 120Hz OLED screen. 70Wh battery on the 16" and 68Wh on the 14", though a 3% difference in battery is probably not enough to be noticeable. The 14" weighs around 1.44kg/3.17 lbs while the 16" weighs 1.96kg/4.32 lbs. I think that is actually a smidge lighter than the Macbooks, but not as light as something like the LG gram or the Asus Expertbook series, though I can’t speak for either of those as I have never owned them.
HP runs sales on their website frequently, so while my configuration normally would have cost around $2200 USD, I got it on sale for around $1600.
Edit: though I guess per your criteria above, yes, it does come with Windows installed and I ended up putting in a second SSD and installing Linux on that. Buying my own SSD was cheaper than upgrading to a 2TB option on their website, and it has two NVMe slots, so now I can dual boot as well. Also bear in mind that in a Macbook, the SSD is soldered to the motherboard and non-removable.