I'm building a family tree through LibreOffice Draw
I didn't know that the connectors automatically draw lines from box to box! For years, I'd been seeking software that could do this. The line-connecting behavior is a bit weird and unpredictable, but it's still fun!
You could also look into draw.io - for most things that people used to use LibreOffice Draw for, this might now be more convenient.
My family tree (bush, thicket) is the ongoing effort of my uncle, started roughly 30 years ago. There are nearly 130,000 individuals in it.
We are migrating his data from The Master Genealogist (TMG) to Geneweb. That is quite a long story 8)
You might like to look into Webtrees.
Geez, I can't imagine how gigantic such a tree is!
Wow, this is so insanely detailed... Thanks for sharing, but at this moment it for way beyond what I'm wanting lol!