In Specifications it reads:
Store up to 5,000,000 TUs per single TM
Users can create an unlimited number of TMs
Users can access an unlimited number TMs simultaneously
WFP5 can read/write TMX 1.4b
TM sharing via the internet or LAN is possible with Wordfast Server or Wordfast Anywhere
Store more than 1,000,000 entries per single glossary
Users can access an unlimited number of glossaries simultaneously
WFP5 can import/export glossaries in tab-delimited text format or TBX format.
Considering the fact that most CATs are based on JAVA/NET Frameworks using SQL, one should consider its and the system limits wisely.