Wikipedia isn't important because of its data. Rather because of the fact it is continuously updated, extended, and fixed at a gigantic scale.
If Wikipedia ever dies, its information will lose relevance by the day. After a decade or two without a similar-scale replacement, will anyone even care?
To be fair, school lunches aren't free in Germany.
Technically they could be considered free if you factor in monthly child benefits (currently at 259€ per child) or parents further qualify for social assistance.