The problem is that I most likely have to get consent (opt-in) from the user in order to collect that data - at that point I can either trick my visitors into giving it by using various dark pattterns or I end up with a dataset that is pretty much useless since nobody will opt-in.

If those are my options I prefer not having to annoy my visitors with consent banners over extended and persistent analytics data. That's why we actually migrated from Google Analytics to Plausible.

By the way: Import of analytics data from Google would be a great feature if anyone from Plausible is still reading here.