This sounds like a potentially faulty methodology, considering how accessible and useful emulation can be.
To add to the point, one video I quite like about the topic and thoroughly recommend, and please do not be put off by its length if you plan to watch it, is Frank Cifaldi's "'It's Just Emulation!': The Challenge of Selling Old Games"
speech at 2016's GDC.
The problem is not emulation, every DOS game here is emulated, Nox Archaist is on an Apple ][ emulator etc.
The reasons are:
1. Keep the list reasonable without titles that - a priori - will never come to PC;
2. The game must be released somewhere in a format that is playable on a PC out of the box. For example: Streets of Rage 1-3 are playable on a emulator, but if you buy them on steam, you can play them out of the box, no third-party software needed.