What do you do about following your celestial target?
Dobson mounts are notoriously hard to keep on track. That is why everybody went to equatorial mounts. Then later went to computerized alt-azimuth mounts.
IMHO, any telescope of any size shows the stars moving so fast it is hard to get a good view--unless it has a tracking mount.
I just don't like Dobson scopes because of the non-tracking mounts.
David F Mayer