What's a paradigm shift? It changes the game, it's not simply a substitution of the CB or Fuse panel. The best analogy to describe Vertical Power ECB is to think back to the typewriter, and the personal computer era. The PC was not a simple replacement of a typewriter, press a key and it appears on paper. Make a mistake and put some 'white-out' on the paper to correct it. The PC added new dimensions to the whole game. We have backspace, cut & paste, drop & drag, spell-checker, and numerous writing and editing features. Electronic storage of the documents, email transmissions, collaboration of editing, and WYSIWYG (WhizzyWig) ... fonts, and a plethora of typesetting features.
To call VP-X a substitution for a fuse block, or CB panel is to ignore the enabling technology that ECB adds. The EFIS displays the VP-X status, and informs the pilot of faults and operating conditions which a fuse panel cannot replicate. The earlier models (VP-50, -100, and -200) included a dedicated CU (Control Unit) and a bank of assignable switches. No integration with the EFIS was required. The VP-X models require the builder to construct the switches and assign them to circuit 'pins' to activate the ECB function. There is an option to enhance the switches by using illuminated switches and the ON/OFF status is then visible on the switch panel. With EFIS/VP-X integration the flap position can be displayed on a widget in the ENGINE page of the SkyView. [Think of that as WYSIWYG, added status information beyond ON/OFF.]
I'll be one of the first to say that understanding the ECB world was initially NOT intuitive and I also troubled over the oversimplification that much of the literature presents. A superficial look at ECB will miss the concept that explains paradigm shift.
Yes, it's experimental - all of the glass panels, and integration is experimental and it's about flying. Yes, some can and do 'buy the package' and turn it on but there is a huge experiment progressing in E-AB aviation. Many vendors are taking significant business risks and striving to converge on the future. Aviation is not just airfoils and stick & rudder.