Not knocking this but I've seen what feels like dozens of script based solutions coming up on HN recently. If the goal is privacy what would this give you over something which runs on the server?
(I'm the co-founder of Plausible)
While the sys admins use kibana/grifana to view data the sort of data analytics provides such as where and how people are going, if people are converting, bounce rate aren't important. The raw stats are what are important. I would not recommend plausible to the sysadmins.