Someone asked me for some information I keep in a small FileMaker database, so I exported it as tab-delimited text and sent it over . . . . .
The reply was full of hand-wringing about how they would cope with a file sent as an attachment from a Mac. My reply was perhaps more curt than necessary (“files are files” was the gist of it), but I explained that using File -> Open . . . . as a tab-delimited file would be all that was necessary. (The filename used .tab as the extension, just to be as unambiguous as possible.)
I had forgotten that Windows *still* won’t let you “drag and drop” a file to an application icon for quick access or to get around opening a file that isn’t currently associated with any application. And to make matters worse, once you make an association, correctly or not, you can’t undo it.
I’m trying to recall when this *wasn’t* a feature in Mac OS: I seem to recall it in System 7 which came out in the early to mid 90s. Even if it wasn’t til System 8, that’s a long time . . . .