IBM Lotus Symphony is built on Lotus Expeditor (Eclipse) platform. It is quite a memory resource intensive platform. For comparison, it needs 66,648K to open Lotus Symphony Spreadsheet compare to 9,660K to open MS Excel.

This would definitely be one deterrent for some people to use Symphony. In my current company, there are still people with just 256 MB RAM on their old PC. 512 MB is the usual. Only the newer pc have 1 GB & above. So with Windows, Lotus Notes Client, etc opened, for majority, Symphony will be consider a very resource intensive application and may be consider slow. It would be a major boost if the resource utilisation can be trim down.