Difference in "need to specify version" between jsr and deno.land

[Xernisfy]

Hi Deno community,

since the launch of JSR 🎉 I've noticed, that you don't have to (or even should?) specify a version when importing a dependency.
You just import { dirname } from 'jsr:@std/path'; and it will resolve to the latest version by default.
When compared to deno.land it's recommended that you specify a version.
Otherwise you get squiggly lines on the import:

The resolution works completely fine either way:

Service	Specific version	No version
jsr	works ✔️	works ✔️
deno.land	works ✔️	works ✔️

I quite like not having to specify a version, as it checks for the newest dependencies on each run (if you don't use a lockfile).

But why is there a difference in how versions are expected?
Is the warning for "Implicitly using latest version..." necessary?

Kind regards