I use snapdrop/pairdrop for quick and easy file transfers, but I found transfers to be quite slow, so this may be an alternative for larger files.

If you don’t want to run a DNS server and don’t want to set up different internal & external IPs you can also use NAT Hairpinning

Quick note, HDD storage is not using transistors to store the data, so is not really directly related to Moore’s law. SSDs do use transistors/nano structures (NAND) for storage and it’s storage capacity is more related to Moore’s law.

Yeah, and even the .su (Soviet Union) domain still exists. There is no way that a TLD as popular as .io will not remain active.