It's an observation from customer purchases and what distributors, repair shops, and turbo dealers tell us (IDParts) about turbo sales and replacements. Not scientific, but I hear almost nothing about CRUA and CVCA turbos (and I place the turbo orders at IDParts). By contrast, we've always sold a fair number of CKRA turbos, until they went unavailable a year ago. Hopefully they'll be back soon.
I'm a fan of the EA288 engine. It has a lot of advantages over its predecessors. Less vulnerable fueling, air to water intercooling to eliminate icing, and the use of adblue allows better tuning for economy and power.