There has never been a truly singular industry standard application for vector graphics software, nothing like what Photoshop is to image editing and pixel-based art...
I suppose it was foolishly worded of me to say "THE industry standard" when clearly there are many other applications falling within this "Vector Graphics Application" category, many of which may be used more prolifically in large scale businesses and governments. Even a barcode design software can technically fall within this category and perhaps the world may have more barcode label [fill in the blank software] designers than illustrator users. However, (and I leave this opinion open to argument) I think Illustrator is by and large the de facto Vector Art/Graphics Application for the "Creative Artwork" market category where "Creatives" produce content suitable for a broad spectrum of scalable output products, both tangible and virtual.
In my experience, Creatives, on the whole use Illustrator as their primary content creation software for vector art/graphics intended for file output and or final compositions. Admittedly, I have no statistical data to back my anecdotal opinion, but I think I am closer to correct than not. Please don't confuse me though for being a die-hard Illustrator supporter because I certainly dislike it more than I love it. I would however dislike it less if the canvas size were to be dramatically increased, hence the title of this thread. (TO BE CLEAR: I am not insisting anyone buys into or agrees to the need for a larger canvas. For all intents and purposes it's just me who wants this.)
Regarding Flexi, it has some decent design capabilities, but the real reason to have it is for driving sign making hardware. We have 3 licenses of it in our shop, but most of the actual design work is taking place first in CorelDRAW and/or Adobe Illustrator. Flexi has some basic short comings, like not supporting all the features of OpenType fonts.
While I am being provocative here I am going to willfully rattle some cages with the following assertion; Corel users (in whole) ARE NOT "Creative" users. (The noun, not adjective)
Please read that carefully before flaming away.
I am not saying Corel users cannot be Creative users, nor am I saying Corel users are not creative users (confusing yet?), but "Creatives" DO NOT use Corel for their primary design application, because if they do then they are ignored (unless the position requires it). There may be an argument as to why Corel is better than Illustrator, but you will not see any certified Creative worth his/her/zer salt add Corel Draw as their first line item on their resume, and I would argue not even as an "Other". Likewise, Creatives by and large will never list Flexi with top billing, again, unless the position requires it. Furthermore I do not disagree with Bobby H about Flexi's OTF support and I will add too its weak paragraph control or any advanced typesetting features for that matter. Illustrator clearly is exceptional for this type or work.
That said, I am a bonafide outlier because I define myself as a "Creative" who 100% prefers to use Flexi as my primary content creation application for vector art graphics because of its inherent efficacy to design production. Regardless, my preference for initial creation software does not blind me for the importance of having illustrator riding shotgun and I will always output an Illustrator compatible file when I am not the final destination service bureau. (Unless it's to be flattened, then I use Photoshop)
Last rant and I'll end this. I have at least 20 "huuge" and massive (and I think very convincing) arguments as to why Flexi outperforms illustrator in vector graphic art creation (even when adding in a illustrator friendly output to the workflow process), and if anyone is curious will gladly start another rant thread for discussion. I think I've ruffled enough feathers for now.