Re: ZX Spectrum Next
The new SwinSid ultimate is pretty good at emulating the sid filters: https://www.facebook.com/swinsidultimate/
It could have been interesting to add a socket to include such a chip (or a real SID). Imo using the SID from a ZX is quite worthless, especially when you can load a C64 core in FPGA and get access to plenty of software... but why not? It's the whole purpose of retrocomputing after all.