Systemize and updating the OS on a rooted FP3

I have disabled many of the system apps and replaced them with ones I feel are better. I have also used the App Systemizer module from Magisk to turn them into system apps. I was told by someone in a private email that if I update the OS as documented here: https://www.thecustomdroid.com/install-ota-update-rooted-android-device-guide/ then they will be deleted. They don’t have to be system apps and I can unsytematize thembut I like things to be aesthetically pleasing and I stops minus signs appearing next to them when if I move apps links around on the screen and I can’t accidentally delete them. Does anyone know if what I was told is true?

I will test it out next time I update the OS. But there might be an issue here.

Regain your privacy! Adopt /e/ the unGoogled mobile OS and online servicesphone

The risk to click on the minus sign when moving an app is low, and the risk of confirming the deletion by mistake is even lower.

If you want to keep root and still update, it would be better not to modify system apps. We never know what the behavior will be : will your own system app be deleted ? Will the deleted system apps be back ?

I agree the risks are low and, of course you are right, but am obsessive about the way things look and work.