One of the biggest selling points for me with BF was Alex's explanations. I'm not a engineering genius, but I'm not a dummy either. When he explains his designs, it makes totally sense. I love nerds, especially nerds that can properly articulate what they are doing.
I have my personal issues with 410s. For recording, they are very scooped sounding. Live, they are pretty directional and the sound is aimed at your knees, making it harder to hear on a loud stage. Packing them up is a nightmare because they are always heavy due to the number of magnets. Side note, I don't watch Scott's channel much, and I'm not sure when this Ian guy started working with him, but I really don't care for him. He is a little annoying.
If BF is working on something that will sound like my DB751, sign me the F up.
I would prefer things don't look retro. I'm sick of retro. The aesthetics of the 70s was total garbage. I lived through the late 70s and early 80s, and never want to go back to a time when it seemed like everyone was blind.