Exactly. This is what I think every time I see one of these old revival projects. I don't want a Spectrum, C64, Atari ST, etc...we have those, they're fairly easy to acquire and renovate. And are more than capable of being run on a FPGA. And there are dozens of projects built around the same old 6502, Z80, etc.
Stop locking your perspective into the 80s to try to recapture that nostalgia.
No, give me a new "hobbyist" computer in the spirit of those days. Throw an ARM m-series/RISC-V/etc on it with some custom blitter/vdpu and sound ASICs and 512MB of RAM. Give it some easily accessible programming environment on ROM, with an option to baremetal with ASM, C, etc. Add a few slots that are MMAPed in. And let the hobbyist field run wild.