I guess it depends on the use case. If you prioritize network and zfs performance, sure. There’s a reason why the Netflix CDN or your router runs some BSD derivate.
I’d argue that the jails are a feature that hasn’t been replicated. Each jail is a container and can be set up as an isolated environment with its own filesystem, network stack, set of user accounts etc. I know there are a few similar solutions on linux but nothing that is so deeply integrated.
Yes, of course. I believe it was a NetBSD developer who initially wrote it.
iOS used to be an absolute pain in the ass. Had to scratch my head for several days a few years ago. I believe it was iOS 15. Forcing SSL and self-signed certs with some odd flags finally did it but it was not straightforward. Good luck reading logs on an iPad. Unfortunately I don’t remember any specifics.
Other than that I’ve had zero issues with Baikal for the last couple of years. Roughly 15 devices (iOS, Android, Windows, Linux), and 5 users each with multiple calendars, tasks, contacts, notes etc. and everything just works. DAVx is excellent if you use Android as CalDAV isn’t natively supported for some reason.
But I get your point. CalDAV as a standard has always felt a bit… Janky? It never left the early 2000s. So setting up a CalDAV server in 2024 isn’t particularly difficult but everyone wants their own implementation. And your server/client combo probably require you to find some obscure forum post from 2009 and reading the man pages several times before you find that one specific fucking legacy parameter in some config file that has to be set.
You could always set up your own Exchange server though if you’re a true masochist.