The only comment with hollow wall anchors - which is obvious in hindsight, but not something I initially cottoned onto - is that they need at least the full depth of the anchor behind the plasterboard for them to seat properly, otherwise they just crush and collapse.
True, though I’ve managed to used them on external walls with dot & dab plasterboard by drilling into the block work behind to make sure they have room to seat before using the setting tool.
The only comment with hollow wall anchors - which is obvious in hindsight, but not something I initially cottoned onto - is that they need at least the full depth of the anchor behind the plasterboard for them to seat properly, otherwise they just crush and collapse.