Hello,
I would love to see a 1VD-powered LHD 70 Series... 1FZ-FE engine performance with about half the fuel consumption.
Daydreaming aside, it might be possible that the decision has been made to ax the 1HZ, save for select markets where its simplicity is indispensable, whether because of fuel quality or operating conditions.
Current ECUs and their associated injection systems are as reliable as purely mechanical ones. They also have less moving parts. On the other hand, they require mechanics with OBD equipment, among other things.
EDIT: a gasoline/petrol engine just as complex as the 1VD, the 1GR-FE, replaced the 1FZ a while ago in the 70 Series. Owners seem happy with it, and maintenance costs are about the same as 1FZ ones.
Anyway, let us wait and see.
Juan