I like the realistic view of noSql vs CAP and the different tradeoffs. We do need to talk more about the disadvantages of noSql systems and all the new database

I like the realistic view of noSql vs CAP and the different tradeoffs. We do need to talk more about the disadvantages of noSql systems and all the new database alternatives. Which brings me to my point - what the author fails to talk about is why spanner has taken the design decision they have made. He does claim scalability, but that is a very general word. I believe the spanner decision is to avoid making a global voting, as in global across the entire world, from North America, to Asia, Europe and even as far as Australia. Such a global voting will take a lot of time - impose seconds of later on any write. I think the author, when he talks about having a single global vote with a small window, thinks in terms of a single database, maybe two regions on the Continental USA, as apposed to spanner trying to be Geo distributed.