You guys have us beat by miles on this one. It's hard to find a kitchen here served by more than 3 to 4 circuits:
1. 5A lights
2. 30A range
3. 30A ring for recepts.
(and that's likely shared with the rest of the house).
There might be an extra one for a washer or dryer, but the odds are against it.
I think the most I've installed in a kitchen is 6 ccts: Three as above, plus dedicated branches for washer, dryer, and dishwasher.
BJ,
A lot of Continental Europe has 3-phase ranges to distribute the load. I don't know about Germany, but in France it's not unusual to find a 3-ph supply with main fuses or C/B of only 20A per phase.