But if you don't mine and therefore don't need Big DAC Power, why exactly would you want to put your DAC's fate in the hands of the collective?
This really made it click for me.
There is ONE thing that having everything on a single chain does... it makes it possible to trade between everything with transactions that are not possible otherwise. If I want to buy Bingo cards with BitUSD and they are two different DACs.... well that is much more difficult.
So think of putting everyone on one chain as a way of enabling atomic and complex relationships BETWEEN DACs.
The problem is that while you have improved the inter-dac network, the intra-dac network suffers tremendously.
It would be like your company deciding to use hosted services located on the other-side of the world for day-to-day file hosting rather than having a local file server. Yes... it makes your files accessible ANYWHERE, but it kills your day to day work experience.
Always tradeoffs there are.