So yes—a fascinating little corner of emulation hacking. If you have a specific game in mind, I can tell you if its 60 FPS patch is stable or broken.
Here’s why it’s interesting and technically clever: pcsx2 60 fps patch
patch=1,EE,0018a3e0,word,24020001 That one word change might force the game’s sceDisplayWaitVblankStart counter to behave differently. So yes—a fascinating little corner of emulation hacking