It is not likely that StackOverflow will implement file uploads into their service. They are trying to discourage people posting files with hundreds or thousands of lines of coding and expecting someone to spend all their time looking for the problem. Instead, S.O. wants people to only post the snippet of code which has problems so that people can easily detect the problem without breaking a sweat and to save server storage space.

However, you do have a good point for programming languages that do not exist in the form of plain text or have to interact with other elements to function, such as the old version of GameMaker (version 8.0 and below, not GameMaker: Studio). If you don't want to hear me brag about GameMaker: Studio, skip the next paragraph.

GameMaker: Studio appears to have a few removed object actions from my experience. Some actions were unknown when I opened up an object in a project file. I find it a bit slower and harder to use than V8.0.

Unlike GameMaker: Studio, where you can paste the code for certain parts of a project, GameMaker files cannot be simply viewed as readable plain text and normally problems are hidden in different parts of the file than what you think.

If you want to give people access to the files that have problems, which you should only do when you really need to, consider file sharing services like DropBox or Google Drive. While Google Drive gives you 15GB of free storage while Dropbox only gives you 2GB free, Dropbox does not care about executable files where as Google Drive will try to stop you in case of it being a virus.

Before I go, don't ask people to download the program you used to create the project file. I learned that the hard way.

EDIT: The words in italics is what I added.

It is not likely that StackOverflow will implement file uploads into their service. They are trying to discourage people posting files with hundreds or thousands of lines of coding and expecting someone to spend all their time looking for the problem. Instead, S.O. wants people to only post the snippet of code which has problems so that people can easily detect the problem without breaking a sweat and to save server storage space.

However, you do have a good point for programming languages that do not exist in the form of plain text or have to interact with other elements to function, such as the old version of GameMaker (version 8.0 and below, not GameMaker: Studio). If you don't want to hear me brag about GameMaker: Studio, skip the next paragraph.

GameMaker: Studio appears to have a few removed object actions from my experience. Some actions were unknown when I opened up an object in a project file. I find it a bit slower and harder to use than V8.0.

Unlike GameMaker Studio, where you can paste the code for certain parts of a project, GameMaker files cannot be simply viewed as readable plain text and normally problems are hidden in different parts of the file than what you think.

If you want to give people access to the files that have problems, which you should only do when you really need to, consider file sharing services like DropBox or Google Drive. While Google Drive gives you 15GB of free storage while Dropbox only gives you 2GB free, Dropbox does not care about executable files where as Google Drive will try to stop you in case of it being a virus.

Don't ask people to download the program you used to create the project file. I learned that the hard way.