Of course there have been particular cases where an industry consolidated during a particular period.
That period being... any moment in time.
You made a much stronger claim: that industries in general tend toward consolidation. Pointing to two or three examples where industries consolidated does not provide much evidence for such a claim.
I didn't point to "two or three examples", but eleven business sectors dominated by huge conglomerates.
On the other hand, pointing to examples where industries did not consolidate provides significant evidence against such a claim.
You responded with a single sector: services.
Even then, I gave a counter-example showing how big companies can drive small companies away.
And you see that happening all the time: Starbucks, McDonalds, etc.
The consolidation is a process, it didn't finish yet.
Economists say free trade is good because of "comparative advantage". But what is comparative advantage? Why is it good?