I wonder how many users actually use those advance features. As someone who has only ever used GA to help provide insight into developmental priorities (i.e. not for marketing), this doesn't help too much. For example, this tells you the browser but it doesn't tell you the browser version. It tells you the device being used, but it doesn't tell you the resolution of that device. It tells you the country of your visitors, but it doesn't tell you the user's language. It tells you pages users visit, but it doesn't tell you the order in which they visit them.
This isn't a criticism of Umami. It looks like a nice clean app that accomplishes what it is trying to do. But if this is all you needed from Google Analytics than that tool was overkill in the first place.