Oldest supported machine for NetBSD is VAX 780 from 1978(!!!). One of the first system supporting mmu, 32 bit cpu, virtual memory etc etc
This machine is so slow that it takes a lot of time to generate ssh keys etc. We talking here hours hehe
NetBSD is known to support like 60 architectures - many of them low end embedded systems: so ftp AS A CHOICE (you have other options!) is very smart and easy
I think GP is confused why the ftp command also handles http(s) :)
I hate to imagine what a 780 running NetBSD would be like, too.
I tried netbooting NetBSD on my MicroVAX 3400, which is about 2.5x the performance of the 780. It did, literally, take 6+ hours to slog through making RSA keys.