[sattoshi]

If Google Docs provides featureset A,B,C and Office 365 provides features A,B,D; you can never have both C and D at the same time.

[marvy]

Is this specific to SAAS? Suppose Word 2003 has A,B,D and WordPerfect has A,B,C, can you ever have C and D at the same time?

[lmm]

You have a single filesystem, so maybe you can open the same document in both one after another to work on the parts that need D and the parts that need C. Of course this relies on having a common format, but in the local-apps world we mostly have those, whereas in the SaaS world we don't even have a filesystem to share.

[marvy]

Ooh, good point. Import/export kind of does the same thing, but much worse I guess.