this is a backward way of thinking. it actually made me laugh. while i agree companies make certain parts unavailable (not just in the RC world) they do so for a reason. its an old line of parts, or the suplly and demand of the parts has dropped to a state where they dont see it fit to keep producing the parts.
you started your reply with a statement that is so generalised, im still trying to get off the floor. i have tried quite a few engines in a short period of time. i have only blown one engine up, and that was my fault. while engine manufacturers are pushing the envelope quite hard to produce a motor with a good usable and drivable power band, what you have not stated is how the car companies are changing their cars and pushing the other side of the envelope. i think there is more internal gear ratio changes in cars of late or options to do so, this is due to the advancements in the engine designs.
while i have just purchased a 12 plus 3sct, i was looking to get the 353. only due to unavailable stock did i go for the 12-3sct. but in saying that, i am more than impressed with the older engine. it is much more powerfull than my LS3, IDM (picco) and Vega, and Werks sirio. i do wish the 353 was a vailable at the time of my purchase, but one day i will get one and be able to see the differences for myself.
IF the Crf is so radical and innovative, im sure Cyrul wouldnt have gone searching elsewhere for reliability and performance.