No one at a dive shop, especially instructors who value their teaching credentials, will discuss diving beyond these limits. This type of diving isn't as new as some want to think. These were the guys that were developing equipment and techniques that allow us to push the edges of the envelope, chasing the demon farther into overhead environments or deeper into the Abyss. Age is not a barrier as much as health can be. It isn't easy to lug a set of 121s up a ladder.
Goals are equally diverse.
Some enjoy the gadgets and gear-intensive nature of technical diving, some do it to reach a long lost wreck or cave passage. Others just enjoy the rush. Training never stops, equipment is constantly being tweaked, and experience is second to nothing. Technical Diving is to normal sport diving as climbing Mt. Everest is to a walk in the park. Maybe it's for you.