Yes, pretty much. I did some work in a hotel once and there was at least one connector failing every month, sometimes every week, even more than one on the same day. I recommended replacing the lot, but the budget wouldn't stretch that far. Cheaper to repair the damage.   Personally I no longer use or specify them, except the ones that are safely fitted inside a WC cistern. It's easy to avoid them - you can readily buy rigid copper tails to fit monobloc taps, and just use regular pipe
    • Like
    1