[docu] plugins' ssr mode deprecated?

[rowild]

Here the docu talks about the ssr option of a plugin definition: https://nuxtjs.org/docs/configuration-glossary/configuration-plugins

It say:

ssr: false will be adapted to mode: 'client' and deprecated in next major release.

From other places I know that mode is deprecated and instead ssr shall be used. Why is this different with plugins? Or is this just a wrong formulation?

Also, it would be great to mention if this configuration also works with node modules and if so, give an example (because it would be interesting to know which path to use).