I still like the idea of “a big ball of goo” satellite.
It creates a large ball of polymer ‘goo’ that is then guided to collide with space junk, most of which is quite small, but moving at a high speed. Being able to change its course, through dozens or hundreds of orbits, each ball of goo snags thousands of known dangerous space debris. Then it collides with a few big pieces before burning it all up in the atmosphere.
How do you control the big ball of goo?..........
Wouldn’t Musk have a good time with this! Great idea.