For those who are apparently unaware of the reason Burris created the E1, it was designed as a version of the FFII that could be dialed up and down more easily, and with a reticle more suitable for longer-range shooting of smaller game, especially varmints.
Which is what some hunters wanted. And it works very well for that purpose--which I know due to having been using E1s for those purposes (mostly varmints) since they were introduced.
For general big game use, yes, the Ballistic Plex is a great reticle, the reason around 85% of my Burris scopes have BP reticles.
But always good to know how many Campfire members know more than optics companies about what will sell--and E1s have apparently been selling well enough for around 15 years to keep them in the line-up.
And case anybody really misses the point, the E1 was NOT designed as the perfect moose scope....