Minecraft on PS3 (Legacy Console Edition) and PS4 (Bedrock Edition) are fundamentally different codebases. The upgrade isn't just a patch—it's a platform shift. Here's what changes.
Upgrade if: You want infinite worlds, cross-play, current updates, better performance, and active multiplayer.
Stay on PS3 if: You only play solo/offline, have irreplaceable worlds, or won't buy a PS4.
For most, the leap to Bedrock on PS4 (or Switch/PC/Xbox) is transformative. Just accept your PS3 worlds stay on PS3.