This article is a pretty good overview of what it's like to play Crusader Kings III, in case the minutiae of succession types, fabrication of claims, and Holy Roman Empire shenanigans sounds fun to you.
Really? The article doesn't mention either incest or gavelkind inheritance.
Where do you think the Habsburg chin came from?
Does it still involve the tedious micromanagement of armies and military campaigns?
It wouldn't have required this, since, who would have dared to decline the proven heir of Heracles and Julius Caesar their rightful claim? :-)
(Rudolph IV substantially upgraded the genealogical claim from the 1st century Roman family of Colonna to Julius Caesar proper.)
And of course Julius Caesar gets you to Aeneas and Aphrodite.
Not only Alles Erdreich, but even all mythos, are Austria untertan?
On this matter, my personal theory is that Friedrich III was just inventing the typewriter and this was his way of advertising it. Just have a look at the 2nd key row in Sholes' 1870 layout, the similarities are striking if not convincing: