THANK YOU. I cannot stand using a raster tool to design UIs. It's insane to me, and it absolutely boggles my mind that it's considered 'standard' practice (other than just going to html/css directly).
Is the process easier in Illustrator-- Design to HTML/CSS? Or does it to build the UI elements easier?
Illustrator is better for the drawing stage of your UI than Photoshop but both are equal when it comes to checking spacing, color values, corner radiuses and so on when it's time to actually build that UI.
It's also a bit more straightforward to export an object drawn with Photoshop than it is to do the same with Illustrator.
Also, decent-to-good "Photoshoppers" are a dime a dozen because both businesses and schools have a weird love affair with Photoshop but decent-to-good "Illustrators" are harder to find. You'll have a hard time convincing your client to make its team of ADs and designers switch to Illustrator.
The initial files will be rasterised - so you won't be able to get the vector benefits of svg unless you export paths to illustrator - which is a bit shit and tedious.
PSD to * is such a bad, bad approach