I used to work for an Australian company that produced HR software - recruitment, 360 reviews, etc. We had a fairly standard list of titles (Mr, Mrs, Miss, Mr, Dr, and maybe one or two others) that nearly all clients were happy with. However, a university asked us to add maybe 60 more, much like the list in this screenshot. We had to special-case it so that this one client got the huge list, while all other clients got the regular list.