We would need to define the terms in order to have proper debate on this. Are we talking number of projects, lines of code, install base, user base, profit generated, or some combination of all of it? My argument is largely based upon loc in installed base.
If you're into idiotic discourse, go ahead and list 1000 open source projects on SourceForge just to "strengthen" your argument.
Tell me - what do most people in industry use for: image editing, video editing, audio and sound design, CAD, EDA, ERP, EMR, logistics, finance - you know actually getting stuff done with those things you mentioned above? Never mind that the vast majority of software written is line of business software.
The landscape of free/open source software has not changed much since the 90s. The market share has increased, some of the names have changed, but it's still the same types of stuff that it excels at (languages, OSes, frameworks).