Time. As technology evolves, application software typically
becomes obsolete. On the server-side MyPHRMachines
prevents deprecation problems by virtualizing
execution environments holistically. The software to
create the idealized environments on contemporary
hard- and software is maintained by big vendors [9],
regardless of the MyPHRMachines-specific extensions.
On the client-side, MyPHRMachines does
rely on contemporary web technologies, but only to
realize a generic remote desktop client. Hence, also
client software maintenance is decoupled from the
number and complexity of PHR software services.