I specifically wrote that FL Studio and Ableton Live are not "geared" toward mixing and finalization. I own both and use both, and feel that this is a total fair a representative statement. No where did I say you cannot mix in those applications, but however, I would not recommend those applications for mix specific purposes. Again, I do 90% of my work in Ableton Live, even most of my mixing in Live, but I would not recommend it as a mix application. I get it, you need to be fair and balanced, that is your job as a moderator. I am looking at this from the perspective of a music creator who spends money on music making tools; Reaper does the job at an incredibly competitive price, much lower than pro tools.
This is not true. Sometimes your system dictates what software you can run. Just because the software is new does not mean it's going to run well on your system. Also, take a look at Avid's support page and you'll find specification regarding hardware necessary to run Pro Tools.