I dunno. If it's able to do what you want automatically that's amazing. If I can just plug the printer in and have it work that's amazing. If I can turn the wireless on my laptop on and it works that's amazing. And so on.

The problems arise when it doesn't automatically do what you want it to do and you don't have a good way of fixing it yourself. I'm not in a position to understand init systems so I will be in this camp if there's ever any problem with any init system. What matters to me, as the end user, is how likely it is to work automatically.

If systemd 'just works', then what's the problem? If systemd is broken... well, that's a problem, isn't it. But from what I've seen a lot (though not all, of course) of the arguments against it are highly political/philosophical and aren't based on whether it's actually working or not.