Until I can easily export the data, where is the vendor lock?
Vendor lock means that migrating away has significant cost or technical challenges.
Take this case: documents saved are first of all easily downloadable from drive (in bulk), and also exportable in markdown.
They change pricing/add features that I don’t want/sell off the company (hard now that it’s managed by a nonprofit but still) etc.? I make a nice bulk download and move everything in whatever other system I want. I can do the same for contacts, email (I use my own domains) and calendar. Basically, 1h + the time to download files and I am moved to another provider.
Can you elaborate in what you think the vendor lock looks like?