Disunited Hapsburg empire

What if soon enough after the death of Charles V the "Austrian/HRE" part of the Hapsburg "empire" starts disintegrating due to the family quarrels? Probably this would assume more numerous Hapsburgs than in OTL (never could keep track of all of them ;)).

As a result, we have completely independent from each other and perhaps even hostile to each other Inner Austria and Styria. One of the Archdukes ends up ruling Tyrol and Caryntia and is being elected as a King of Bohemia. Austrian Hapsburg is trying to keep "Hapsburg Hungary".

Austrian Hapsburg main retain the HRE crown but succession is not a done deal.

What would be the consequences?
 
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