I don't believe reducing unnecessary maintence and the potential for inducing oil leaks every 25 hours is 'dumbing down'. I for one encouraged Rod to fit hydraulic lifters every time I saw him. Even my old 55 Vauxhall had hydraulic lifters. People who like adjusting tappets need to get a life.
Read my post again, once temperatures are stable there is no need to adjust the valve clearance. I cant be bothered adjusting valves either. Through bolt tensions also stabilize. In the case of Jabiru engines I will take the solid lifter every time.