Exactly. The question was never about Genesis.
As to Retro players my take is 'yes'.
Why? Because 'almost 70%' is (a lot? - at least 30%?) less than 100%. I will again point out that I specifically asked about astros with < 30 fields.
However, judging from the reaction that question has raised here - exactly none - I will retract that question if no one else deems it important.
Thank you for your patience.
*edit* for clarification, upgrade for retro in my view specifically means more fields (30, same number as for Genesis) for small asteroids (<30 fields)