schizandra

Mike Austin makes extensive use of custom vector brushes in Illustrator (which I know because he posts Ai tutorials on YouTube and his subscription site). He has some of the best vector pieces I've ever seen. Here is a link to his DeviantArt gallery:
 
http://humannature84.deviantart.com/gallery/
 
ETA: I'd also love for this functionality to be added to AD! :)

Hi,
 
I hope you don't mind, but I have a question about your question. Out of my own curiosity, I googled "Illustrator restate line" (because I've never heard of that before) and nothing relevant came up. I also googled "Illustrator restate path" and "Illustrator restate stroke" and also nothing. Is there perhaps another, more official term used to describe the feature you're referring to?
 
Sorry I can't be of any help, but perhaps if people more clearly understand the feature you're talking about, they'd be able to do more to help.

According to what I've read from the Affinity team on these forums and social media, Serif intends to release a fully functional version of Designer (and I believe Photo as well?) for the iPad Pro. No ETA though. 
 

I really only use photo editing software, but I occasionally use vector drawing software, and wanted to support the developer, so I bought both.

Hi Schizandra. For me this is a pair of applications that work so well together that enjoying one without the other now seems perverse. As I understand it, they share the same underlying software 'engine' so your work can move from one to the other and back without fuss and so layers can take advantage of both. Consider Madame's post above and don't allow yourself to think it has to be 'EITHER' Raster 'OR' vector -- Freedom! (And roll on Affinity Publisher, can't wait)  :). Thanks everyone for this compelling software and the discussions.

In short I would say, final image tweeks and corrections to colours, contrast and lighting. These I find are often easier to do in Photo if needed.
But having said that 90% of your time or more will be spent in Designer.
At the price point for these apps then having Photo as well, even if only needed occasionally in your workflow, I think is a good investment.
A nice thing about having both apps is that you can send a project file from Designer to Photo an back again without having to close and open the separate apps. In whatever app you’r in just go to; File > Edit In Photo/Designer.
To facilitate this further, where possible I have loaded exactly the same user added content like brushes to both apps. Though I would note vector brushes are only usable in Designer.
Finally out side of creating original art I’m sure you must take the odd photo or two from time to time, no? And every photo deserves the chance to be edited with Affinity Photo ;)

Well, filters.
And the ability to process pictures. I take pictures of anything I can think of for composites. 
I need to develop them.
 
I think they are so affordable that I purchased both without even thinking about it. -And they work so well together.

i am a hobbyist photographer. i looked at some designer tutorial and was literally amazed by what a digital artist can do with it and by the process itself of creating an image... but i wouldn't even imagine where to start from and how: basically it looks like my brain is not able to conceive a non-existing image and start the process of creating it by using tools that make it come into life. i am rather used to "frame" what i see around me and fix it into an image using my camera. then i can improve that image, or sometimes modify it and (hopefully) add some feeling. sometimes i use the drawing tools that photo implements, but the way i use them is anyway oriented to image improvement.
 
from my point of view, designer is for those who create images using digital tools where they would have used paper and pencil twenty years ago or so. photo is for those who start from a photograph and need to do what they would have done by diving into a dark room twenty years or so. since both programs feature a set of tools that usually pertain the other field (that is, they overlap somehow), my personal opinion is that as a digital artist you can start with designer alone. if in the future your workflow includes adding pixel images, possibly photographs, to the images you create, and you find that those photographs may need complex editing in order to be used, then you could consider photo too.
  obviously your mileage may be very different...