Patrick has put an SSD on his old iMac and he's going to install Linux on it. Will printers and audio cards work? Will they have drivers? Leo says they will work, but he won't get Linux drivers from the manufacturers. He'll get them from the Linux community. Look up CUPS for printer drivers for Linux. It's open-source. But he shouldn't need separate drivers, Linux should support it. But Epson does have a Linux support page.
Also, Linux installs are a greater challenge on a Mac. That's where problems arise. Recent Macs have T chips that work with the secure enclave and that'll make it harder to install. He may not even be able to install an internal hard drive.