The chance of them hitting anything in the time it takes the sun to swallow the earth is probably tiny?
As for more probes - getting more speed than these did efficiently is probably hard, let alone the fact that they don’t generate personal profit probably stops them being politically viable for a while…
As for more probes - getting more speed than these did efficiently is probably hard, let alone the fact that they don’t generate personal profit probably stops them being politically viable for a while…