> I think letting market decide is better choice. Overregulation leads to decrease in competition and production.

Not intrinsically, obviously, as anti-trust clearly shows. I am not anti-big intrinsically, for many of the reasons identified.

But I do think there are obvious downsides to be guarded against. If anything, as technology improves, technological barriers to entry should decrease and less big companies will be needed to work on certain advanced technologies.