i have an theory that there are other stargate seeding ships similar to the SGU seed ships, still seeding planets and galaxies outside of their original perspective solar systems. for both the milky way styled gates and the Pegasus style gate systems.

they did this with SGU and the other seeding ships, why not with these other seed ships?

not to mention how many other galaxies could there be stargates within,

in SGU it was above 49 galaxies if i remember correctly, but the possibility's of the milky way styled gates as well as the Pegasus styled gate systems are more than likely seeded within many more galaxies. it would be silly for the alteran to only keep these gate systems only within their perspective galaxies and just stop right there.

if you look at an galaxy, there are all possible routs of an neighboring galaxy's that could exist in all directions. destiny and the seed ships that were sent before it were all sent on their path as predetermined based on the programmed rout of the seed ship or ships sent before it.

but there are galaxies all around our own within either direction, so it's possible that the second version of stargates are also still being seeded till this day, just like the seed ships that were sent out before destiny.

I would also consider that the Technology has advanced possibly a few thousand years since the first version of stargates existence, so the seed ships could be considerably faster and more advanced than the SGU seed ships, as well as the SGA seed ships.

the only example i know of that supports this theory points to the Asgard home world in the Ida galaxy, as it appears to be of the same model as the Milky Way network of gates.