Yeah, the Street definitely thinks Adobe has a hit, and look at the sub numbers:
http://www.sfchronicle.com/business/article/Stung-by-Steve-Jobs-remarks-Adobe-6097346.php#/0
But someone asked about PS and RAW and such. For both PS and LR the same engine, in ACR, is used. ACR/LR is what is called a PIE (sorry), a parametric image editor. PS is a destructive pixel editor by definition. It's like the old days where you'd print a couple of negatives and then cut the head off someone in one print and paste it onto the other print; voila, image editing. You have lots of undoes and some saving options and other sorts of stuff (see
https://helpx.adobe.com/photoshop/using/nondestructive-editing.html; LOTS of ways), but a PIE goes way beyond that and actually stores metadata about adjustments. They are very different, although if you just do something like crop you wouldn't notice.
In a sense, the PIE evolved out of PS. In PS we had a master file, and wanted all the layers stored inside, with layers sorta being like versions, but were combined to make a whole. And when making documents you had the problem where you wanted proxies instead of the big old files, and so on. But check out
http://www.adobe.com/digitalimag/pdfs/non_destructive_imaging.pdf; it does a better job of explaining than I can.
TL;DR: PS is destructive by design, but you can work around it. RAW conversion is handled by ACR/LR, which are non-destructive PIEs by design.
Finally, DxO has a very very nice round trip workflow where you can use DxO to do some work on the RAW, but then output RAW back to LR in the form of a DNG, so doing other work is possible. See here:
http://www.dxo.com/us/photography/c...-your-dxo-opticspro-10-and-lightroom-workflow