These particular ones won't stay in orbit long. If left to decay naturally, maybe 5-10 years (tending towards the lower side of that range, but there's unpredic

These particular ones won't stay in orbit long. If left to decay naturally, maybe 5-10 years (tending towards the lower side of that range, but there's unpredictable factors that can have an impact e.g. space weather). However orbital decay times increase exponentially(ish) with your height. At the higher orbits they've gotten permission to use, it can take more like 200-1000 years to decay naturally