I couldn’t find the example I had in mind, but it was something that was over 120GB. and the unpack was 8+hrs on what is arguably a reasonable PC.
You forget most people do not have a CPU that has 24 threads, 12 cores. And on top of that, the amount of RAM required can be questioned. If you think your 64GB RAM and 16/32 CPU are “normal” then you are just kidding yourself, and its probably not your money you are spending on it to but it.
Then on top of that, most people have an ISP that can reach far higher speeds than you propose. Mine is a basic minimum of 25MB/s as a basic minimum. I’m sorry to hear that you cannot get even that, but that is as common as muck in most western civilised worlds.