You seem to know your potatoes.
Is there any long running successful franchise that has actually ditched an engine completely and wrote one from the ground up mid way through its life?
2010/11 was the last time I worked on AAA projects. Of the folks we worked with that still have their own engine tech:
Sony (I think PhyreEngine has been deprecated though)
Nintendo
SquareEnix (but I think they have jumped ship fully to UE at this point).
Capcom (big ups to their RE tech).
Konami had several back in the day.
EA (frostbite...but I don't think that is used on every title.)
Take 2 (RAGE)
CDPR (Red Engine....but now they use Unreal Engine I think.)
I am sure there are others, these are just the folks I am familiar with. ActBlizz, Take2, Microsoft, have tons of their own tech (usually from acquisitions) but many of the core engines are based on other tech they have purchased a modifiable license for. An example would be like Amazon did with Lumberyard (Crytek) which they later abandoned/turned into O3DE which is maintained as an Open Source 3d Engine project.