Amp, and convention over configuration in general, don't prevent configuration, they just try to avoid it. There are a bunch of things you can configure in Amp, if you'd like: https://amp.rs/docs/#configuration
And that's just for Vimscript plug-ins. There are several situations (e.g. fuzzy file finders) where external binaries are preferable, for performance reasons. The idea is to include those directly in Amp, so that it's _only_ a configuration file that's needed, if at all.
That said, Amp doesn't have plug-in support at the moment, so it's a little unfair for me to judge Vim on that front. But if it did, the package management portion would be baked in so that you'd only need to pull your configuration file and Amp would handle the rest. :)