How long can the HRE survive post-Westaphalia?

Off course after every country let a deligate sign the treaty of Westaphalia, the Holy Roman Empire was sentenced to an existence in name only. How long could it last in this state, and would it dissintegrate due to war or diplomacy? (Hopefully, a butterfly taking out Napoleon would help)
 
You could have it technically continue to exist up to the present, even if the only reason it does so is that the "state" isn't formally abolished - so the Archdukes of Austria continue to call themselves Emperors of the Holy Roman Empire even if that "empire" is merely the Habsburg state that OTL became Austria-Hungary (or less).

Could disintegrate either way (War or diplomacy), a lot depends on specific events.
 
Does it have to be the Holy Roman Empire of the German Nation? If the Austrians started treating their domains like parts of the HRE, it would survive on paper for much longer. The Habsburgs just have to cede their claims as emperor over the parts of Germany they don't control and expand elsewhere. Provided they set up Elector Princes or something similar in the Balkans, I think they could keep going well into the early 1900s.
 
Does it have to be the Holy Roman Empire of the German Nation? If the Austrians started treating their domains like parts of the HRE, it would survive on paper for much longer. The Habsburgs just have to cede their claims as emperor over the parts of Germany they don't control and expand elsewhere. Provided they set up Elector Princes or something similar in the Balkans, I think they could keep going well into the early 1900s.
I think, that they would only continue the HRE in such a scenario, if they are made the hereditary emperor. It was not an accident, that they didn't even try to make their possessions outside the empire part of the empire, the subjects of these lands probably wouldn't like it and they have few to gain by it. Even nominally outside the empire, it would still have made their Hausmacht in the empire stronger anyway.
 
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