Media Buttons from 3rd party plugins

Hi,

I am a developer and some of my plugins use something like this to add a button above the standard WP editor:

add_action('media_buttons', 'add_my_media_button', 15);

I am not seeing these buttons showing as ‘blocks’ in the Gutenberg editor. I found this Github question (https://github.com/WordPress/gutenberg/issues/794) about it, and that has been closed, but this still seems to be an issue.

My question is, will this be fixed before this goes into core?

Thanks,
Scott