[timetc]

There are indeed not a lot, but with Matomo (Piwik in the old days) it is possible. You can create analytics based on logs. When you host it yourself and use the correct privacy settings it's a great solution.

Like mentioned by other you of course lose a little bit of accuracy and you don't have front-end tag manager related features (like listen to scroll positions and element events). Although you gain a bit of accuracy too, because some privacy tools block analytics calls which isn't possible with the access logs approach :)