The "good time" to discussion unionization would have been about 10 years ago when employees had much more leverage.

But I quite vividly remember any mention of that here on HN back then was responded to with "I'm paid great and can easily change jobs why would I want a union?" (with many engineers only thinking of factory worker unions as a model and forgetting that very highly paid and in demand actors also belong to a union).

You negotiate when you're in a position of strength, not while your value is rapidly falling through your fingers.

With AI and a growing population of ex-corporate workers desperate for work breaking up attempts to unionize would be easier than ever.

If every employee is part of a union, what happens then when companies over-hire?

Ironically an HR department is detrimental to unionization efforts

Why?