Exactly my point. AVGAS is an outmoded fuel supply.
Does a Lycoming do the job? Well yes it does, but at what cost. Lycomings use old technology and that means money.
Lycomings cost a staggering amount of money for what they are, yes they are made in low numbers which skews the numbers, but are they really worth twice as much as a BMW M5 engine? For a little 100hp O-200? I know which I'd rather spend my money on!
Are Lycomings reliable? Not really, the ancillaries are usually the problem, but how many AD's do you see for things like crankshafts?
Rotax engines aren't the best solution either, but at least they are designed with MOGAS in mind.
JETA1 is the only real future fuel for GA a/c, especially in countries with a high tax burden like the U.K.
Why couldn't have Lycoming come up with a JET powered engine burning about 10l/hr. If they had, they'd sell thousands, combine that with a "new" Cessna and the 2 seat market would be theirs for the taking.
I just don't think they tried very hard with this and that is very disappointing.