why your boat keeps exploding, a weld physics rant

every build a boat player has watched their masterpiece disintegrate halfway down the course and i finally get why. the whole game runs on unconstrained roblox physics, every block is a real physical part welded to its neighbors. that welding is the charm, you snap blocks together and it just works, but its also the ceiling. stack a few hundred parts and the physics solver is doing an insane amount of math per frame, so your framerate tanks and the welds start failing under load. hit a wall or a lava jet and the force propagates through the joints until something snaps and the whole thing ragdolls apart. its not a bug exactly, its physics being asked to do too much. i love it to death but from an optimization view its duct tape all the way down. if i ever build something like this im capping part count hard and faking half the physics.