Hello,
I have Raspbian (stretch) up and running on a Pi 2 with basically just kodi.
Would it do any harm, to put the sd-card into a Pi 3 and put it back into the Pi 2 again? Could this corrupt the system or even not work?
Thanks, selch

As long as it's fully updated/upgraded should be fine (current versions for the "newest Pi" are expected to be backwards compatible with older Pi's, but, especially just after a "new Pi" has become available, versions released before then usually need to be updated/upgraded to work in said "new Pi")