Why does the Prusa Mini show a Stop option on the screen when purging?  

RE: Why does the Prusa Mini show a Stop option on the screen when purging?

Not the only place. There are other menu options that show a Stop button, which can't be activated.

RE: Why does the Prusa Mini show a Stop option on the screen when purging?

I agree, I find it rather odd.

RE: Why does the Prusa Mini show a Stop option on the screen when purging?

The purge is likely a single instruction to feed some mm of filament at a predetermined speed. There may not actually be any effective way to interrupt an instruction mid execution  other than forcing a reset of the printer.

RE: Why does the Prusa Mini show a Stop option on the screen when purging?

@rick-2

Understood. Just from a UI perspective, in such situations it would be better not to show an (inaccessible) stop options, which only serves to confuse users. 

Having said that, I'd rather the developers focus on other less cosmetic issues to fix, such as the problem of Octoprint not receiving a filament run-out signal from the filament sensor, or adding the ability to name sheets, etc...

RE: Why does the Prusa Mini show a Stop option on the screen when purging?

@fushsr I agree, the name sheets issue is a PITA, fortunately, they appear to have solved the filament runout sensor.

RE: Why does the Prusa Mini show a Stop option on the screen when purging?

@paulb

Yes, but...

I have a Mini with Astroprint, and it still doesn't recognize the filament runout. Positive reports though from Octoprint users so I guess it's an issue with the Astroprint software. I have a spare Pi with Octoprint lying around, will give that one a try at some point.