I can almost pin point when the ERA started to go down hill and it was right after the locator came out
I have no proof but it seemed to me that they changed the quality of the Nylon/plastic they used in the attachments shortly after in a vain attempt to sell more parts as well
I noticed they started to wear out much faster. When making tooth born cases we would utilize the plastic pattern to cast in Type3 gold or High gold ceramic alloy and the ring would also wear out eventually. The locator solved a ton of these issues with their design and officially killed the ERA in the process. The use of a cast too SS or TI attachment solved a ton of issues as well
The micro ERA was a sad attempt to get into the mini implant market and honestly never caught on, the angle corrected version Ken mentioned never seemed to catch on either. The thread timing and cemented abutment component while in theory works perfect its the clinical error that was often what made these things not work. I have seen clients try to eyeball the placement in the mouth rather than take a fixture level impression and send to the lab to arrange and fabricate the cementation to line things up.