AFAIK:
Eucalyptus are fast-growing trash trees, imported from that faraway distant place where people stand on their head.
They smell nice when made into balms.
Drop bears eat them exclusively.
But:
They burn VERY fast and hot during a wildfire.
They drop leaf litter everywhere.
The grow fast and aggressive like bamboo.
Chop it to a stump and it grows back.
They are non-native to the state of Cauwyliforniuha or whatever it is called.
Even the environmentalists want to get rid of it.