Performance was very, very good in my experience. Benchmarks normally took a 10% hit vs their equivalents on windows, but being able to run macOS on arbitrary consumer hard made performance incredibly cheap. My first proper bang-for-buck machine was an i7-4790k with an R9 270x GPU, 16GB of RAM, and a combination of SSD and HDD storage. Total cost was around $1300 CAD if I remember correctly, which is absurdly cheap compared to what you’d have to pay at the time for a Mac with that performance. I also ran macOS on a 2x E5-2670 machine with 64GB of RAM, as well as a 2x E5-2697 v2 machine, and an i9-12900k machine with an RX 6950XT GPU, all of which were incredible value compared to an off-the-shelf Mac. It’s only recently that Macs are catching up to hackintoshes performance-to-dollar wise, because Apple Silicon is very, very good. Once I get my WRX90 workstation hackintoshed it should give the Mac Studio and Mac Pro a run for their money, but not for much longer if Apple drops support for x86 after macOS 16.