That's not saying much, since we have only observed roughly 0.0000001% of our galaxy's planets. For all we know there are more planets with trees than without.
Maybe it's less of an issue these days, but about 10 years ago I tried Usenet and most things I tried to download would give "missing articles" errors (or something along those lines). This was with a paid Usenet account (don't remember the name).
You can mitigate this with Timeshift