[D] Why isn't GNN in high demand in industry?

Almost no job posting for Data Scientist or ML Engineer needs GNNs.

Is it because it's computationally expensive - both time and space? Or is it because preprocessing data to a graph format is not always intuitive? Or GNN awareness is still low outside of academia?

academia data data scientist demand engineer format gnn gnns graph industry isn job low machinelearning ml engineer space