why would I want to? Because they charge extra if you don't check your cabin bag... I know you can still take a personal item, but it just seemed easier not to have a large laptop sticking out of a small bag (which is what I ended up doing).

EI's dangerous goods guide (Jan 2023) seems happy enough with "portable electronic devices (PED) containing lithium metal or lithium ion cells or batteries including... consumer electronics such as cameras, mobile phones, laptops, tablets" going in both cabin and hold luggage: https://www.aerlingus.com/media/pdfs...goods-2023.pdf