Stumbled on a blog post today about this topic, which is worth the read IMHO - "Why I moved away from FOSS as my main toolset". The author, whom I first met when he was a student in a LEVA Level 1 and/or 2 class I was teaching the better part of 10 years ago, raises some valid points about leveraging FOSS in DME workflows; training, support and documenting FOSS tools being the points I agree with. To that end, keep your eyes & ears open for news about professional training & support for FOSS solutions related to DME.
With that said, I'm going to make a few comments and pose a few questions to the community based on the above post, so if you haven't read it...the rest of this post is probably moot.