[DanBC]

There are brand new machines. Some haven't been released yet.

They come with a tiny bit of ram 2 gb, 4 gb if you're lucky.

The processor is 64 bit, but because of the small ram you'll suffer with a 64 bit OS. (Both Microsoft and Arch wiki agree here).

[simplyluke]

I don't think arch has ever been particularly focussed on writing an OS for the least performant hardware in circulation.

[mastax]

The "correct" solution to this problem is the x32 ABI [1]. I wouldn't be surprised if it's not well supported in the real world, however.

[1]: https://en.wikipedia.org/wiki/X32_ABI