You want them to be independent, atomic. How they are deployed and the choice of technology you choose to couple them with? That should be driven by load -- and

You want them to be independent, atomic. How they are deployed and the choice of technology you choose to couple them with? That should be driven by load -- and dynamic. The reason everybody's so hot on microservices to begin with is that we kept coupling everything all together and it became a huge mess to manage. You don't want to repeat that mistake, only at cloud scale.