CorelDRAW has a standard price for mainstream graphics software. Every add-on application, utility, etc in the box is included for no extra charge, "freebie add-on" software. Obviously the motivation behind the original question is cutting costs. Why pay for expensive RIP software like Onyx if the same thing can be included in a $400 box of mainstream graphics software for no extra charge?
You can still cut costs without having to get a free be add on. This is assuming that it is very close to feature parity or at least feature parity for what the individual needs it to do. FlexiSign (which if I'm not mistaken is the basic design/cut level) versus Draw and CoCut Pro is/was a savings of about $600. As long as feature for feature for what the user needs is on parity.
Large format printing is a different animal, that's for sure, but depending on what you are talking about, it may be able to be done.
For instance, in that embroidery plugin versus the free add on that I've contributed to, if you were to pay for Adobe CS4 - CS6 full license (no trade-in, trade up), your looking at ~$4100 for everything. You can get more feature rich stand alone programs and still purchase Ai (perpetual license) along side.
Yes, I know Adobe no longer has perpetual licenses, I'm using this only as a means for easier price comparisons.
The bare minimum for stand alone software that I would need would be $3,000, just because my machines have a function (that not many have, at least here in the US compared to just regular embroidery) and those can't be had on the lower end. In the commercial world, the bottom line price is $1500 and that's actually still considered high end consumer use. Sub $1k, some are good, some aren't. Some do some things really well, some don't do anything well.
However, that free add on on a free base program would net your more functionality then the Ai/plus embroidery plugin (at least based on their brochure which is outdated, has CS4 screenshots, but system requirements mention CC 2018 and Draw 2017, so some of it is still being updated) in some ways, but it does have one advantage, if the user needs it, not so much for me, but some do depend on that certain functionality, I value others over that, but not always the case.
Far more than just sign people use CorelDRAW. So there really is no good reason for Corel to include a RIP application in the retail box. Large format RIP software is a specialty niche product. Just like digitizing software for embroidery. You have to buy the add-ons separately and they're often not cheap, due largely to development costs being spread out among a limited customer base.
This is exactly why I was unsure that it would be as cost saving as letterman had though, however, there are instances, depending on what the user needs, to where cost savings can be had. It depends on the individual situation. Even among free extensions.
I, however, do not see Corel getting involved directly in any type of CAM type of extension for the very reason that you mentioned.
Even if Corel could include RIP software in the CorelDRAW package they would open a big can of worms in the process. There's lots of different printers out there. Corel would have to devote resources to fixing bugs and doing other software maintenance work. Plus, they would have to make sure the software was fully Postscript and PDF compliant. Right now they can barely keep up with maintaining CorelDRAW itself. The 2018 version of CorelDRAW has had only one update so far; there are bugs they haven't addressed for months.
I don't disagree with that. I thought all along that Corel wouldn't do it on their own. Almost all of the heavy lifting is done by the writers of said extension or software that wants direct integration with Corel, but can be run alone if needed.
Ironically though at one time, you could get Corel/Wilcom software (high end consumer version, DecoStudio) thru Corel's website. I thought that was strange, but that hasn't been the case in a long time, at least as long as I can remember.