Thank you, Bernhard. I know that, but I have thought that the nextcloud team doesnt name them 3rd-party apps anymore, since they are an integral part now.
@cloudguy I dont think they were advertised as an integral part. Like @Soko mentioned only the sync backends are built into ownCloud/Nextcloud. The apps you are seeing are just the 3rdparty frontends
They are not shipped, so they are 3rdparty … same applies to Collabora and also for Spreed.ME. These apps are also 3rdparty, but this does not mean that they are not developed inside of the Nextcloud community, or that they are not receiving support from Nextcloud GmbH as part of an support contract:
https://nextcloud.com/enterprise makes this clear. Here you can see in the pricing table, that there are plans which include support for calendar/contacts.
I don’t want to open the question what support means … Lets say it like this: If you pay, and you have an enterprise-subscription, the Nextcloud GmbH would also support you to use calendar, contacts, Spreed.ME or Collabora Online (according to the individual agreement) - and they resolve bugs when clients are reporting & requesting this.
But: This does not mean, you can go to the calendar repo, report a bug and say “I thought this app is official. Why is it not fixed as fast as I want”.