"Over a pair of superchargers" means that if two Teslas are charging on the same SC circuit then each of them will only get 60kW. A single Tesla can draw up to 120kW (I routinely get around 115kW on SCs when the battery is almost empty) but that does taper off with the increasing battery charge.
Tesla is up to 150kW in Europe (120kW in the US). Hyundai Ioniq supports 70kW according to this site: http://insideevs.com/hyundai-i... . So nope, still no other car with similar capabilities. I don't doubt that this will change in future, but for now only Teslas can really the full supercharger capabilities.
Right now there are NO cars on the market that are capable of accepting full Tesla supercharger power. Tesla did say that they're open in future to collaborating with other automakers, though other automakers don't seem to share that desire.
An example of real-world problem: crappy init scripts. With sysv-init a shutdown sequence can hang forever, for example. It's not a theory, it happened to me personally: https://lwn.net/Articles/61679...
Yes, there were multiple votes. Debian's technical committee voted for systemd, OpenSuSE committee voted for systemd, Fedora (that was independent from RedHat at that time) adopted systemd before RHEL.