Well, DPP may be adequate to handle some needs. unfortunately not my needs. And unfortunately it is in no way competitive to what Lightroom offers. Yes, DPP is free of charge, so no problem there. But ...
LR gives me what I always wanted: "one-stop-shopping for everything I want do with my images".
Only one software to purchase, learn and keep current. Both powerful and reasonably intuitive to use. Only 2 file formats involved: RAW ["digital slide / positive"] and .jpg ["digital prints"]. No bloated TIFFS, no proprietary multi-layer .psd files, no complicated software with multi-month learning-curves, no absurdly outdated 80's style user-interface, no functions targeted solely at graphics professionals or print shops ...
And no more need for single-trick pony software apps just to import images, rename images, add and edit EXIF/ IPTC metadata, tag images, sort, organize, catalogue, show, share and edit them.
LR has allowed me to cut all the post-processing software clutter. One seamless workflow. All editing directly on the RAWs, but totally non-destructive. Since LR 4 with the ability to also apply local adjustments, not just global ones. Everything handled in one window, rather than separate windows popping open for different types of image editing and manipulation. Excellent de-noising. Fully automatic correction for all my lenses, if and when desired.
As I am not interested in creating composites or doing extensive pixel-level manipulations or CGI content I have no need for other post-processing software whatsoever. LR does it all. Yes, there are still improvements possible, but LR 5 is pretty darn "close to perfect" for me.
Therefoe, I do not want to revert to a mere RAW-processor like DPP or Capture One or SilkyPix. I want ONE "stills images handling program". Unfortunately LR is the only sensible software option currently available to me [thanks to Adobe killing off Pixmantec and others]. Aperture ... I do not use Apple Macs. And all other programs I have tried are either subpar or total overkill relative to my requirements.
This is why I have paid the license fees for every version of Lightroom so far. I am willing to pay for it in the future. I am also willing to pay a reasonable little extra money to use it on a mobile device as well.
But I am not willing to move to Adobes creative cloud/subscription-based model.
I find DPP perfectly adequate for most needs. Of course it is not as powerful as Lightroom etc., but it does the job, nicely and efficiently. Every picture I take starts its life in DPP, and I do have Lightroom but will not be upgrading to the CC version (yet).
Of course eventually we will all have 5D Mark IVs, 1D X Mark IIs, and dare I say it a 7D mark ii (or iii ), plus new lenses etc and Adobe's technology will move forward just as quickly, so eventually we may not have a choice of upgrading, but need to out of necessity.
Adobe are a business and I can see their logic.
What I really, really do not get is why I, or anyone else, would want this on their phone. I never edit anything on my phone.