Its not said that they need devs to target home machines, it says they need to give the resources so people can host it themselves, period.

Before attacking me with such an arrogant rant, maybe read what I wrote.

I said:

Once they release the source, people can refactor or reengineer it to run on smaller scale, replace proprietary databases with free ones, etc.

So of course it's about releasing anything (!) at all.

I simply said that you can't compare a small fan project like a WoW self hosted server with Blizzards infrastructure and the requirements to have a high available setup for millions of players.

ArenaNet is quite open about their infrastructure and you can see that this is far from trivial, but also allows them to have zero downtime updates. That is a huge feat, but also means that self hosting that thing will be a pain in the ass. Yet I would not want them to not do this just so it could be easily (!) self hosted some time in the distant future.