From my own experience with colleagues doing ML: because they don't trust google anymore. Rumor says it's related to the reason we're migrating from angular to

From my own experience with colleagues doing ML: because they don't trust google anymore. Rumor says it's related to the reason we're migrating from angular to react: the risk google will deprecate technology X is not quantifiable, if there are other solutions covering the same problem space not suffering from the "will it be deprecated tomorrow" problem, they'll win.