After an unintended break thanks to a disk crash on my Hetzner server, I'm back now. And looking back, I have to say that Hetzner's support went well. I only have standard support, so support is only available during the specified service hours. Both days (on Monday because of the system setup on a new disk and on Tuesday because of the server restart due to a hang) they responded immediately in the morning. When I pointed out further disk errors (or rather CRC errors), they also responded immediately and rebuilt the system - apparently their disks are usually in swap frames, which also explains how they were able to install a new disk for me so quickly.
Well, let's see how long it lasts this time. In any case, I was able to test my crash recovery and have to say it works surprisingly well. Okay, there were a few minor issues of course, but it's all manageable. Only http://muensterland.org/ suffered, as the server's database file had to be rolled back one day since the most recent file didn't work. Well, manageable problems...