Why even in the era of TF2.x does ART not like eager execution enabled? Why stick to TF1.x style code?

[swapnilsayansaha]

classifier = KerasClassifier(model=model, clip_values=(0, 1), use_logits=False)

This line assumes you have eager execution disabled. However, for custom models, disabling eager execution leads to a lot of error. For example: tensorflow/tensorflow#39908

Why does ART still rely on out-of-date TF1.x style code?