The days of x86 macOS are numbered. I don't think there are good ways for running ARM macOS on non-Apple ARM CPUs and I am not even sure there are ARM servers comparable with M1 in single-core performance (maybe latest AWS Graviton?)
It was like those folks that put Ferrari logos on red Fiat sport models.
Either get the real deal or something else
The PowerMac G5 Quad cost $3300. The Base model Mac Pro that was release less than a year later cost $2200, and it greatly outperformed the G5.
Base model PowerMac in 2005 - $2000 Base model MacPro in 2012 - $2500
Adjusting for inflation from 2005 to 2012: $2,000 becomes $2,359.67
After adjusting for inflation, Apple raised the price by $140 between 2005-2012, but they also 6x the base RAM and WiFi became standard. Not to mention the significant performance and efficiency improvements.
I don't know how much the WiFi upgrade cost on a G5, but if it cost more than $140 Apple actually reduced the price of the Pro workstations during the switch to intel.
This allowed me to experience using macOS as a daily driver (at home) while saving up for an eBay macbook (macbook pro 13 mid-2010)
The Hackintosh community is a vital step of "try before you buy" for many like myself.
If I wanted buttoned up single-use OS there is iOS. But almost no one wants that as their primary OS because they want the customizable, extensible OS.