Rationale for picking the Willy, X-Mass, Nova modern CPC peripherals:
* Willy is a simple PC LPT connection adapter, nothing modern about it. The OPL3 chip has been released in 1990. The MIDI protocol was created in 1983 and General MIDI has been adopted in 1991. So the authenticity of the vintage CPC is preserved.
* The IDE/PATA mass-storage interface has been designed in 1986. So it really preserves the CPC experience too.
* The NVRAM in Nova is useful to handle the FAT filesystem in mass-storage without using the CPC RAM (for compatibility with old CPC software) and without the performance penalty of using the mass-storage itself as NVRAM. Also some older RTC chips suffered from the Y2K bug and so are useless now and have to be replaced.