Original sentence: For example, data transfers take place at Internet, rather than local Ethernet speeds; the provider may go bankrupt and the firewall may not permit integration with back end systems.It may not be easy to judge the importance of such issues when an implementation is first started, however they are largely resolved by the Hybrid SaaS model.Other concerns are detailed below.That can achieve an economy of scale and the capacity to balance supply and demand.This requires areas of IT that are ubiquitous and commodity-like.While the SaaS model has many advantages, it also has drawbacks.Widespread implementation of SaaS requires well defined services
Edited sentence: While   commodity-like