Do you actually have any idea how many there are?
In just the inner orion spur there are 2,606 systems reported on edsm with bark mounds, it's possible that many system will have multiple bodies with bark mounds, and that's just from pilots who actually report to EDSM. So that's one type of biology, in one area of the galaxy. There are 10 types of biology in the inner orion spur, so maybe 26,000 systems with biology.
Now lets look at geology. 4,000+ systems with sulphur dioxide fumaroles, I would suggest maybe more than 100,000 entries for all types just in the inner orion spur, millions in the galaxy as a whole. The sheer load of your computer handling that much data is a problem, and the you need need to update everything every time you log in?
There may be a good reason they just keep it to first discovered.