You use multiple weights that telescope into each other ( https://www.hermco.ca/products/2000-series/ https://www.hermco.ca/products/2000-series/ ), or a segmen

You use multiple weights that telescope into each other ( https://www.hermco.ca/products/2000-series/ https://www.hermco.ca/products/2000-series/ ), or a segmented counterweight (Kelley E-Systems one company that does this). But they require space and a sturdy housing. Springs are as compact as you can get. There are also some safety concerns, a cable connecting the door to the counterweight can break, and/or slip. This can result in pieces of metal flying everywhere. A broken spring typically stays contained. Personally, I would do one of the counterweight systems for my new house.