@6slyboy6Any form of transport has its drawbacks. Vehicles can get stuck or run out of gas, mounts can die of thirst or starvation and they get injured way easier. Also, that speed of a wolf giving chase? I'm assuming that's a wolf unencumbered by armor, an Orc, the Orc's armor, and the Orc's weapons and other equipment, if any. The rate of advancement in vehicle tech, compared to that of the real world, is accelerated due to the addition of magic and the ability for different factions to simply take the knowledge they already have and apply it in a new direction. Yeah, IRL early vehicles were limited in speed, but IRL we didn't invent jetpacks during that era either.
The best I can do I suppose to give you an idea of what you'd be jumping into is if you pictured someone riding a giant wolf in Mad Max. It's cool, but compared to what's going on around it it's probably not one of the more competitive choices available.
Some sort of golem is the closest that anyone might come to doing anything mecha, but it would only be fitting if it were from some magic-heavy or artifice-heavy culture, like Dwarves or something.
@KRIEEEGCorrect me if I'm wrong, but I think the Illithid already is bringing a tank.