I hate Plymouth
The benefit of having it is so minimal. All it does is give you a boot splash screen. However, it can make your system hang on boot or shutdown. It’s happened to me 3 separate times on CachyOS.
I don’t understand why it’s installed by default on some distros. It’s purely for eye candy but when it goes wrong it’ll prevent your system from booting. Awful awful trade off.
There’s nothing wrong with installing it yourself if you like it, but it should never be a default in its current state.