I am saying that the mentioned security vulnerbility is not as big as ppm make it to be. The bad thing right now is that IF you know the exact path of a media item you can probe if its there. As soon as you varg your path by just single character from the default/guides that are out there, this is basically no longer practical.
Is this ok? No. But to fix this, every Client would be broken.
The current API dies not follow modern security practices since some are not or partially autheticated. Thats basically inherited by Emby.
That is the current main issue and needs to be dealt with.
I assume that after the last EFcore (database handling) this gets addressed since now the API can be designed around the standerized databade calls.
Also overseer is also not saying "pls host on the public internet". If you do so, you are on your own. Why jellyfin gets treaded different? I do not know.
EDIT: I guess at least some ppl, use this as a comfortable excuse to stay on Plex. "But it is insecure... so i can not set it up"