I'm actually shocked at some of the earlier comments in this thread, particularly the ones advocating the deaths of Allegorithmic staff. Pretty sickening really. Those people should be ashamed.
I understand that a lot of customers are unhappy with this move, but there is nothing you can do about it - what's done is done. Just stop bleating, grow up and act like the graphics professionals you think you are...
And the harsh fact is, I imagine there will be big changes to come, it doesn't take a genius to work out that once the Substance products get the Creative Suite makover and are fully assimilated, they will no doubt look and feel like every other Adobe product. They will have to fall in line visually or they will stick out like a sore thumb and spoil the marketing aesthetic...
I've been around in this industry since time began... well, perhaps not that long, but since 1991. I was working as a Web Designer when Adobe acquired Macromedia and as some people have said, products from their stable where assimilated and some were axed - but I really don't think that's what will happen with Substance.
At the end of the day, I'm pleased for Allegorithmic - they have worked hard and deserve financial rewards, in some ways I'm envious of them.
And who knows... even though their products might become 'Adobe-ized' over a period of time, they could still innovate and push forward the boundaries of texture authoring like they have done in the past.
I wish them the best of luck, and I, for one, will stay with them on their journey...
p.s. just please don't axe Substance Source
