Seems like there might be a lesson in there somewhere - maybe that saving money on software purchase costs [by e.g. refusing to pony up the money for potentially superior software] does NOT NECESSARILY imply a long term increase in share values?
LOL
"Potentially" is the operative word.
Like it or not, as open source software continues to mature in particular categories, it will be adopted by anyone with enough of a clue to not continue to throw away money on unnecessary licensing fees.
For industry-specific tasks, that will remain largely proprietary for the foreseeable future.
Just because you choose to use some open source stuff, doesn't mean you can't also use proprietary software where it makes more sense.