[floatboth]

In some fields (3D modeling, PCB CAD) FOSS software could be considered mainstream, in others (audio, photography, vector graphics) just really good.

Yes, unfortunately, architecture CAD and BIM are not among those fields :(

[gorio]

Few of those fields have professional software available for Linux i.e. what is actually used in the industry. It's the students, engineers and artists that are invested enough to switch platforms. Most people are just going to use the FOSS software on Windows instead.