[monkeypizza]

The selection in Ashkenazi was not done in the same way proposed here - filtering took whole lifetimes. In this system, you compress the whole "live 50 years and have slightly more / fewer children" step into one procedure.

This one is equivalent to picking the best one of 50 naturally occurring children, and raising them alone, every generation.

If Michael Jordan he had 50 children with a similarly elite mother, most of them would regress to the mean - but the best one could conceivably be near his level. If he had only one kid, it's very likely that the kid would regress significantly.

Also, of course there are negatives to high IQ but most of the time, this selection method wouldn't be done for that level. Two people of IQ 100 would be able to reliably have children of IQ 115, and those kids would have happier, longer, healthier lives, with no increased risks. [see the scottish IQ study; iq at age 11 was linked to a lifetime of better outcomes]

That is the real benefit of this technology - to give people the option of gradually bringing out the best of what's already inside themselves. I don't want to be forced to give my kids a random selection of my genes - I want to exercise some control. And of course there could be problems - perhaps +IQ genes might lie next to other, undetected bad genes. But that's random, and we're already completely subject to it.