You would either not even boot due to buggy UEFI implementation, or it was cheaping out on some hardware that there is not driver for anything except the OS release it came with.
In some aspects, the hardware on high-end-insh laptops have moved nowhere in the last few years. Yeah, they've got slightly better GPUs to handle 4k, Vulkan/SPIRV and new media codecs, and faster SSDs once they've got rid of SATA, but the CPU performance moved just in percents and it comes with the same memory. My wife still uses 2012 i7 Thinkpad (T430s) with 16 GB RAM, and there are not many cheap machines that could be objectively called better. Certainly not in the $300 range. Heck, until Ice Lake, you couldn't purchase a laptop with more RAM unless you went into luggable workstation segment, so it is no wonder that MacOS works relatively OK on 5yo machines. They are still way better than $300 Acer, despite that Acer having possibly some better paper specs.
In some aspects, the hardware on high-end-insh laptops have moved nowhere in the last few years. Yeah, they've got slightly better GPUs to handle 4k, Vulkan/SPIRV and new media codecs, and faster SSDs once they've got rid of SATA, but the CPU performance moved just in percents and it comes with the same memory. My wife still uses 2012 i7 Thinkpad (T430s) with 16 GB RAM, and there are not many cheap machines that could be objectively called better. Certainly not in the $300 range. Heck, until Ice Lake, you couldn't purchase a laptop with more RAM unless you went into luggable workstation segment, so it is no wonder that MacOS works relatively OK on 5yo machines. They are still way better than $300 Acer, despite that Acer having possibly some better paper specs.