It primarily adds features.

It fixes the problem reported here [1] but that's probably not a common problem and the person who reported it probably already migrated.

[1] https://orgmode.org/list/87d05nidu1.fsf@iki.fi/

On Sat, Sep 5, 2020 at 9:04 AM Bastien <bzg@gnu.org> wrote:
Hi Ian,

ian martins <ianxm@jhu.edu> writes:

> Sure, I'd be happy to maintain ob-java.

Thanks!  Does your work on ob-java.el fix bugs or does it foremost
add new features?  If the former, we can add it now to master, then
add you as a maintainer immediately.

> The drawback with keeping ob-haxe in an external repo is that the
> tests won't run when org-mode is changed, but in practice its tests
> are very similar to ob-java's so the actual risk of it being broken
> by a change will be small if ob-java is in core.
>
> I'll submit ob-haxe to GNU ELPA after ob-java has been accepted. That
> way I can take out the common parts of ob-haxe which will have been
> incorporated into ob-core.

Yes -- for now (< 9.4) we cannot accept changes in ob-core.el.

Thanks,

--
 Bastien