I'm really impressed with it. Even in MyPal, I get error pages at times. Things don't work quite right. Lun3r is a little bit better. But Supermium somehow emulates modern 64-bit Chrome on 32-bit. And it can do this without Chrome telemetry and bloat (degoogling is built in as an option in the installer). I can also get adblock and all kinds of other extensions.
I'm highly contemplating uninstalling MyPal, because I'm beginning to see less and less of a need for it.
Anyways, Supermium is great for web browser 3D games on Windows XP. Good to know!