FWIW, in one of Ryan the ride mechanic's videos, he mentioned that Zamperla Discoveries do not have the longest shelf life. They need a major inspection after 10 years of operating, and a serious renovation/replacement of structural parts after 20 years. Harley Quinn only ran for a few years but if these rides really don't last that long, those few years plus any wear and tear of disassembly and relocation would shorten its already short lifespan. If true, SF might not see the point in relocating it.