@nicolasdanelon There have been lots of bug reports/feature requests to add items that are not desirable in Shaarli's core (integration with external services, HTML/markdown/wtf parsers) because it's a link sharing solution.

These features are wanted by many users, and we should provide a way to add these without altering the main code (which breaks the upgrade path). So there must be room to add third-party code to Shaarli, which is currently a very simple addition to the code, using RainTPL templates in this pull request: shaarli/Shaarli#129. I encourage you to read shaarli/Shaarli#14 and the linked issues.

why are "we" spending time in this feature?

Because everyone scratches his own itch. Everyone is free to work/not work on what he/she considers important. That's what Pull Requests are for :)