Years ago Wago were the first to champion "spring clamp" type terminal blocks. My partner in our panel shop at the time fully embraced them because he felt it cut down on shop labor time. We built a bunch of panels for Boeing using them and I had to go out on site and make a bunch of field changes, I HATED them and vowed to never use them again. Boeing also promptly banned them from their projects as well. It was not for performance issues, it was because of how difficult it was to make changes. The spring clamp would "dig in" to the copper and even when you used the special tool to release them, the little burr on the copper made by the clamp would prevent the wire from coming out without breaking either the terminal block or the wire.
When Wago came out with these to replace wire nuts, I lumped them into the same general category. But out of desperation last year, I had to use some and I have to say, I liked them. From an industrial use standpoint however, there is no specific code for industrial vs residential vs commercial, yet some industrials have their onw internal standards. I know a number of industrials that do not allow wire nuts on anything other than office lights and plugs. I know others that disallow crimped butt splices. So I'm sure there are some that will say "No lever clamp or spring clamp splices" too.
They tend to be happy to be included in the conversation.
