I thought they were expensive to operate ?
I think there were some issues early on around engine maintenance costs, Jetblue in the US had some concerns. If the Boeing chart below is anywhere near accurate then at 3% of operating costs, that should be controllable. VA ditched their Embraer jets because the Wunderkind JB said so. Now they are still paying leases on them whilst stored in the US (not this one). A brilliant move to replace E jets with ATR turboprops.