4 GB of RAM is enough only if you install something like Debian+XFce (not gnome/kde/cinnamon or ubuntu/fedora), and only if you only use up to 3-4 tabs of web browser at the same time along 1 more app. Basically, you will need to always be conscious about the things you have open. But it is doable if you are the conscious user type like I am. Definitely not enough for things like 4k video editing, or multiple apps open with many tabs open each. Also, always go for the x86 version, it’s better supported.