A move to Standard Generic Satellites SGS could help resolve space junk
the SGS system would involve a modular design of box, solar panels, replaceable batteries, replaceable controller, replaceable sensor array, camera array, replaceable main board, replaceable communications board, spare room for more boards, a bay for replaceable redundancy boards etc
They would be placed into an orbit whereby future resusable maintenance supply ships, can replace easily swap modules then visit or wait for the next satellite in the orbit ring