Just amazed

I got a Raspberry 4 and made myself ready to switch from the old 3 to this ne. But: Should I really change a running system with deConz and all that stuff?
I read about migration and backups and stuff…
And then: I just unplugged everything - including the external hard disk used as storage - from the old and plugged it all back into the new.
Booted that thing up and…
Man - it worked without any changes at all! This stuff is so cool!

I just want to let you know: Using an external data disk makes migration from Raspberry to Raspberry a breeze.