I think Kessler syndrome is still likely to happen despite the best intentions and efforts of all players involved. a 1,000km circular orbit is very, very stable, so if something goes wrong and the satellite doesn't deorbit itself properly, it will be there a very long time. If there are on average 4000 of these at a time and only .1% of them malfunction in this way, that's still 4 per year.
Well, eventually we will get Kessler syndrome at some low altitude orbit. But at a rate of 4 satellites per year, we can stay complacent for a couple of millennia.
But yeah, expect this number to grow fast as more people do stuff like that. It will be a problem eventually.
