Marc,
Apologies again - GPUs are ground power units. If the name hasn't given it away, their purpose is to power the aircraft on the ground. They get wheeled over to the aircraft and plugged in, the FO (First Officer) puts a token in and you get electricity for 15 minutes.
The point I was trying to make, albeit in a rather childish fashion, sarcasm being the lowest form of wit and etcetera, was that if those three types you mentioned initially were to be scrapped, BACX would have no aeroplanes left and nothing but the aforementioned GPUs. That's rather a pickle for an airline isn't it? Therefore, in closing, I found your suggestion highly unlikely as perhaps not obvious my final flourish.
From reading your last post, you certainly seem to know your aircraft and have an eye for whats going on in the industry, I thought for a moment you were about to sell me my own regional jet. The thing is, this is not fantasy association football (soccer), and aircraft types are not changed as unilaterally and easily as I think your posts suggest. None of this wheeler dealing is going to happen - you can't just scrap all the aircraft a company owns, or in the case of BA, its 737s and 320s. As I'm sure you appreciate, its not just the cost of the aircraft hulls - but all the infrastructure, legalities, administration and expensively-trained, specialised staff employed for that aircraft, like engineers, and cabin crew.
RMC,
I don't understand the point you're making, but I do love what you did with my nom de plume - fantastic! Although I think if you'd managed to couple it with something that rhymed, in the fashion of children in a playground, say, you would have got extra points.