If I hadn't lived in America for 4 years (and my sister having to do a presentation on it), this last year would be the only time it has crossed my radar.
El Nino has (imo) always been an Americas thing. I don't think it has ever been significant enough to touch the news cycle in the UK.
And even now, I don't know if my awareness has picked it up due to the UK news cycle or due to the US-centralism of so many social media sites.
150mm^2 obviously (tho only for 400A). Don't know that I've ever seen 800 amp powerlock, I guess they would be 240mm^2 and above.
I think they are talking about more industrial/commercial applications that use ceeforms or powerlock for 1 or 3 phase: 16A, 32A, 63A, 125A (I know, we were so close). Anything over that is powerlock, and I don't know if any single phase powerlock.