To be honest, this seems quite reasonable. Space is obviously a unique environment, but to use an imperfect analogy: we don't let cars that break down just sit

To be honest, this seems quite reasonable. Space is obviously a unique environment, but to use an imperfect analogy: we don't let cars that break down just sit in the middle of the road, and we don't let dilapidated buildings sit unattended until they collapse. There's an externality to leaving a EOL'd satellite in LEO, now these new rules require that externality be priced in. Either through the cost of reserving enough propellant for a de-orbit burn, or perhaps, one day, for more expensive satellites, a new industry could emerge for refueling/boosting/servicing to extend the sat's life. This regulation seems like a good sign that the commercial space industry is starting to mature in a healthy way.