Who wrote this rubbish?
"BBC Micro Model A of 15 years ago". The BBC model A was introduced in 1981. Clearly history (or simple arithmetic) is not the authors strong point.
"Micro:Bit’s two ARM Cortex MPUs are descended from the Risc chips of that old Acorn machine." Again complete inaccurate, as the BBC micro used the MOS 6502 processor. It was the later Archimedes that used the first ARM chips.
I don't dare read any further.