Leading suppliers all have an SOA product line, but it is not obvious whether the products being sold are really always as leading edge as they are made out to be. Many companies are fed-up with being expected to join the latest IT bandwagon. They already bought into client-server computing, and when that proved hugely costly, they were sold thin clients and enterprise application integration (EAI). One wonders how many successful EAI projects were rolled out. Not many. It was costly and too difficult to maintain.