Migration to Fusion may require multiple upgrades of each oracle fusion application package. For the majority of applications, Oracle will issue an upgrade to Fusion from only the two latest oracle versions If you’re using an older release, you’ll have to upgrade to one of the newer versions first.
Fusion is a complete rewrite. New product releases have more problems than normal upgrades. It’s often better to upgrade after the software has been in the field long enough for the initial bugs to be identified by some other company.
There will be a shortage of Fusion specialist expertise after the initial product release. individuals with Fusion experience or even Fusion training will be in demand and very expensive.
According to Ronald Schmelzer, analyst at Zapthink (a SOA consultancy), SOA promises tremendous benefits for manufacturers because 70 to 80 percent of their IT costs are for just maintaining their systems. However, even if a manufacturer chooses not to go down the SOA route ,adopting SOA will not be optional because in the next few years, says Schmelzer, “the major ERP vendors, SAP and Oracle, are making their customers adopt their latest platforms … both of which are SOA to the core, and basically providing no other upgrade path.” These are indispensable ERP applications for any manufacturer. he claims, “By 2010 80% of manufacturers will have adopted SOA because they had no other choice.”