According to
https://www.bitcoinkpis.com/privacy, Wasabi coinjoin volume averages around 700-800 BTC per week, while JoinMarket volume averages around 1000-2000 BTC per week. And as an added bonus, if you are in no rush to coinjoin and are happy to be a maker providing liquidity, you can even earn some fees doing it.
This is good source of information and nice comparison between Wasabi, JoinMarket and Whirpool.
However, I think that most small fish lazy people prefer easy one click solutions for privacy, and bigger players are using JoinMarket, that is why they probably have much bigger volume.
Downsides are you need to run your own node, and it is more complicated to set up for the average user than opening a Wasabi wallet.
Do you know if it's possible to use this with pruned Bitcoin node as well?
It's not that hard to run this for most of the people.