Hi Sky4!
Horses for courses, I'm afraid. Regrettably I only need a relatively pedestrian trad-spamcan to conduct PPL training - although I'd really love to be able to have a fleet of bigger-engined Bulldog GTi s if we had the dosh and didn't mind the fuel burn!
Add to your list of observations about the ancient engines we have is their expense! The last one I bought cost us over £16K including the labour. What happened to that Avgas burning neo-diesel that was being proposed? It was supposed to be quieter, cheaper and far more fuel-efficient.
I'm glad to hear that the Grob is at last going to be equipped so that it can fly in IMC. Up through winter cloud to teach S&L 1 with a ruler straight horizon, then back down for a quick ILS. That's what we used to do in the British-built all-metal military trainer with a respectable roll rate when training UAS students - including a certain charming young lady geology student - at that aerodrome near where you live!