Just updating on my experience: After exploring Matomo and Google Analytics, ease of implementation definitely went to GA, given that Discourse admin has in-built support for it. Rich reporting features won me over as well, though privacy concerns still persist.
Decided to go for GA for now and revisit Matomo or Plausible (thanks @neil) further down the road. Thank you for voting/contributing!
Primero deberías pensarlo, porque una vez que lo uses, ya no podrás eliminar los datos recopilados por Google, incluso si cambias a Matomo (o a diferentes soluciones centradas en la privacidad). En mi opinión, las estadísticas integradas de Discourse ya son más que suficientes