[tsimionescu]

That still means that if you lose your domain name (gomod.garykim.dev) for whatever reason, you have to modify your code.

[morelisp]

You can use a replace directive to handle cases like this without updating the code.

https://golang.org/ref/mod#go-mod-file-replace

[tsimionescu]

Only if you're the final consumer of that module - if you publish it so others use your module, the replace directive will be ignored and they will get a failed build (or have to add their own replace directive for your sub-dependency).

[morelisp]

Yes, but this is roughly the same as any packaging system - the ones that don't use DNS as a default namespace require you to add explicit package repositories, which is no more or less onerous than the replace directive.