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I just discovered this amazing app! It lets you remove (or just disable) preinstalled apps like Facebook, Netflix, etc. and system apps like samsung knox apps, diagnostic, bixby, and even One UI (but you must have installed other launcher). You can’t brick your device, worst case it falls into a boot loop and after 5 reboots it will factory reset.
Debloating your device will make it faster, more private and more secure (less atack surface).
How is a novice to tell?
Looking at the github page, the tool seems to come with certain lists telling you what is safe to delete based on what brand the phone is from or what carrier you're using.