I've done some tris, but mainly prefer to just do the elements, usually 1-2 at a time. But I also surf, which takes time and money (at least enough to live near the coast) and that's not ergically expensive. But there is a "blue sky" effect. Some of the biggest, most important thoughts I've had are alone in the cold dawn waters waiting for a wave. Others have been while chatting with a trusted confidante on the bike or the trail (no one talks while swimming, that I know of...).