Download the collection to test games, then buy the ones you love on modern re-releases (Nintendo Switch Online, Limited Run Games). This respects the developers while preserving the hardware.
8/10 – An essential tool for preservation, but a chaotic mess without curation. Treat it like a library, not a landfill. gbc rom collection
Do not download the 2.5GB "complete" pack. You will suffer choice paralysis. Instead, download a (usually ~200-300MB) that includes the essentials, the hacks, and the artwork. Download the collection to test games, then buy