@parker >MATLAB
Garbage, GNU Octave is a replacement - it's compatibility is quite good and any case of incompatibility is treated as a bug.

>Adobe's various tools
All garbage - I find quality free software like GNU ghostscript actually works properly unlike their software.

>most people have to work within their employer's workflow, would rather get to their work than spend months learning a new workflow
I don't get where "months" comes from, it takes a week at most.

Yes, most people don't even think about making improvements to terrible inefficient workflows.

Proprietary shit is often terribly inefficient and so taking the time to use free software to write a script etc to replace proprietary parts of the job saves massive amounts of time in the end.

>specialty software for businesses don't build for Linux
This appears to be referring to custom software and if the contract for that is properly prepared, you should just be able to grab the source code and compile it for GNU.

>don't offer enterprise technical support if they do build.
If you are at the point of paying to get fake proprietary technical support, you should pay for real enterprise technical support and get custom software written for your needs instead.