Ehh gonna talk about my experiences with cubes and durability.
Dayan and Gan are the only cubes I can confidently say that you shouldn't have to worry too much about breaking.
Moyu has good metal cores, but I will almost never by a post 2023 moyu cube with a plastic core. The Rs3m v5, as someone who only just recently got it, has significantly better durability (by the looks of it) then when it was first released in 2023. It is the only puzzle for some reason I cant stop dropping.
YJ goes mostly unnoticed till recently so there isn't much data to prove whether or not it is prone to breaking but based on the beta it doesn't have any major breaking issues. Unless you count the squan v2, I wouldn't worry.