I’ve expanded Infinite Mac to cover NeXT operating systems, with the help of the Previous emulator. See https://infinitemac.org/?filter=next for all releases between 1988 and 1997, and https://blog.persistent.info/2024/03/infinite-mac-nextstep.html for tidbits about the porting work and other site updates.
And to keep things in the #MARCHintosh spirit, you can use the Daydream/Darkmatter emulator to run System 7 on the emulated NeXT hardware and so have a replica of one of the more esoteric combos of the early 90s.