PrinceCorwin

Slight refinement: put the combined shape on top, change the fill to none. Then you can have an inside stroke if you want.

Come on Affinity. Moment of truth. AD is a vector software. DXF / DWG is the most used, recognized, and shared vector file format across the globe. No excuses at this point. I work on CAD at work and Affinity at home (only because I can't afford an AutoCAD license for home use). I'm about to jump ship, although you probably don't care now that you've gotten my money. It's been "considered" for years. At least tell us why it hasn't been implemented.

Come on Affinity. Moment of truth. AD is a vector software. DXF / DWG is the most used, recognized, and shared vector file format across the globe. No excuses at this point. I work on CAD at work and Affinity at home (only because I can't afford an AutoCAD license for home use). I'm about to jump ship, although you probably don't care now that you've gotten my money. It's been "considered" for years. At least tell us why it hasn't been implemented.

You have been "considering this" since the first requests from users began back in 2015, maybe even earlier. Its been an export option in Illustrator and CorelDraw for ages, even Inkscape does it. I would just like Affinity to come clean about it. Is it even on the roadmap? Do they acknowledge that any modern vector application should be able to export to the most broadly adopted file format across digital production machines? Why has something that seems simple, an export option, taken so long to implement? Is it a royalty issue? 
I just want some answers since I've been awaiting this since I first bought Designer back in 2015.