Export and Save As should be the same menu item with an option in the dialog.

There are many many more but start with the app having the overbearing assumption that it thinks you want save to its file format rather than make an ad hoc edit.

That “overbearing assumption” is made by practically every other X-media editing app, for good reason — you can save your work and continue/revert stuff later. If all you’ve ever used is MS paint then I guess it’s an unexpected thing, but any other image/video editing app, digital audio workstation, 3D modeling software, etc… work exactly the same way. It would be unexpected to me if “save as” exported a flat file.

Gimp doesn't save undo history in the XCF.

The difference between exporting and saving is extremely important, and is something the user must understand in order to prevent data loss.

And Gimp users are not more likely to know that? It adds up to extra clicks for 90% of the images I load.

how does the save/export distinction result in extra clicks? they are in the same menu right below each other. pick the right one. if you don't know you may pick the wrong one the first time, but after that you know. i find it faster than having to choose the format i want from a "save as" dialog