As per the article they're slowly shuttering the project, but I assume AlphaFold itself is still available and usable?

I assume that AlphaFold isn't perfect, but surely after so many years on it most of the useful juice had been squeezed in terms of making it a useful tool?

google-deepmind/alphafold3: AlphaFold 3 inference pipeline https://github.com/google-deepmind/alphafold3

And then host then database.

AlphaFold did not yet solve the Folding@home protein folding problem.

Folding@home: https://en.wikipedia.org/wiki/Folding@home