We lost 70% of our player base half a year in

[Absurdity]

Usually I hear that about ultimate, which it is on average a lower end single digit %, though I've not seen that on raid community. General raid is also minority (but a pretty decent size, at least double digit %).

The single digit % occasionally get thrown around by people who have no clue what they're talking about and usually come with arguments along the lines of

Savage is content for elitists that nobody is doing and should be removed from the game. SE should instead cater to ME and my desire for more XYZ casual content.

Depending on the data center the savage clear rate is up to 30% of the population, iirc this only counts the people who have cleared the entire tier and not the people still progging or only doing 1 or 2 fights.