Earlier quoted context omitted.
> I actually do use desktop calendaring software which will stop working this summer. What's the software? Google CalDAV support isn't actually going away, it's just switching to a whitelist, so depending on your client, it should be fine. I don't know how that's going to work exactly (is it just an API key? how will that work with open source calendaring software like Lightning?), but if it's even moderately activel…
The software is KDE (Akonadi), Thunderbird (Lightning), and a few small utilities. It seems probable, though not guaranteed that Lightning will keep working. But I don't want to bed the farm on that, I doubt KDE will be supported, and I'd really rather just use a calendar that faithfully implements the standard instead of whitelisting the standard for certain clients. In terms of XMPP, I checked yesterday. After upda…
For XMPP, it's the Hangouts app that I was referring to as the "new chat system". Federation for regular google talk was turned back on[1], but you'll need a third party XMPP client now, I guess. Fortunately they're quite common.
[1] http://www.fsf.org/blogs/sysadmin/google-reinstates-federate...