There are much better options out there. Quite apart from the solutions listed in these comments, a better option is to reconsider whether you really need analytics at all. Maybe the answer is yes if you are a business trying to understand your customers. But not every blog and project page needs analytics.
But in seriousness the 10 lines would be just use local storage or wotnot to store a tag, then call tracker.com?tag=... on each page load. "Rest is done on the server (TM)"
Of course, if that is all you are doing, you should be using Matamo or Fathom or whatever, but it is not fair to say GA could easily be replaced.
I've have used GoAccess for a while now and is mostly happy with it. It's fast enough and can generate pretty good looking static html which is mostly what you want for those simple use cases.
A side effect of processing log files is that you can freely try software on historical data.
That said, that will only do about .01% of all the features of GA; like the infamous "FTP vs. Dropbox" the premise itself isn't exactly "wrong", just missing a bigger point.