Most nanosatellites can survive the low-earth orbit, which is about 500 kilometres to 600 kilometres, for three to four years, but it's usually less than that. It depends on whether the spacecraft comes back to earth to de-orbit. If it stays up there, again, you're dealing with the very harsh environment of space, primarily the radiation environment, so two to three years is a fair assumption.
However, in terms of the approach that we are taking and that a lot of other new space companies are taking to this, the rate at which the technology is evolving here on earth doesn't really justify us launching a satellite that will stay up there for 20 years. We are still doing that, but again, even with your phone, when you compare that with your phone of two years ago, you can see it's much faster. You have better cameras and things like that.
You have the exact same thing in space. If you can reduce the cost of your spacecraft so that you can launch more frequently and have better capabilities more frequently.... Some companies have that approach.