How is Sketch file support? When we've tried to share files via Dropbox it's constantly stepping on each others toes just when someone tries to open it for view-only. Makes collaboration difficult between a designer and a developer.
*Sketch files are actually folders with data, previews, etc. The act of opening the file actually modifies things like the thumbnail.
You are right that Sketch files (up till version 3.0.4) are actually file packages, but we support packages so it shows up as files online. This is the same as OmniGraffle and Keynote files which are actually folders. We have build our syncing technology to differentiate folders and package files.
Sketch just officially launched 3.1 two days ago which creates files that are actually single files. We can still support version control for these files, but we are working on fixing the preview generation for the new Sketch format.
"Sketch's file format has changed; documents are now truly single files and can be safely emailed or shared via Dropbox and other services without having to zip them up first"
*Sketch files are actually folders with data, previews, etc. The act of opening the file actually modifies things like the thumbnail.