I think lore honestly depends on the type and the individuals participating. Everyone has their own views on how extreme situations can get within a lore perspective or what can be modified. For example, WoW's demon hunter class only has two specializations due to "lore reasons" but that can be translated into various ways especially since several other classes in the WoW world have had specializations added and/or modified over the years. Blizzard could have honestly added a 3rd specialization because one of the demon hunter npcs has access to a scythe and utilizes some magic abilities, but they took the lazy route imo. This is seen any many mmorpgs though because people believe certain things can't exist at certain periods of the game due to "lore reasons" which can greatly hinder the advancement of the game depending on the ideas wanting to be introduced.