They were more than likely all expanded with Huawei DSLAM's.
They stopped installing ECI cabinets mid 2016.
There's really nothing to worry about when it comes to getting stuck with ECI hardware on FTTP**
Even if there was only an ECI OLT in an exchange, an FTTP rollout would almost certainly see a new OLT from another Vendor installed for the rollout.
Huawei, Nokia and Adtran are the 3 current FTTP vendors, but there's a 35% cap being introduced on Huawei.
** The only poor souls that should end up on ECI FTTP are those with it already rolled out who just haven't signed up yet.