> Basically all of these things are teething problems. The early adopters have problems, the problems get solved, then they're solved for everybody

It's not just teething problems.

Using OpenOffice and Linux means that you're opting out of the substantial ecosystem of legal-specific Word add-ins - document templates for court filings, semantic analysis for contracts, metadata scrubbing, etc. Most of these tools are only available for Windows although some of them support Macs. A small practice can get away with using Linux but a large firm would be foolish to do so.