Autosomal is useful for identifying parents and siblings. Beyond that its alot of guess work. Theres a chart but when you become 2 generations down of a common ancestor or more its more hard to track how you are related. Where as haplogroups are set in stone. You are related to this person. All you have to do is track that one line in the paperwork and you find your common ancestor. Autosomal is way more tricky because autosomal distribution is random and recombines And no. Its not thousands of years only. Also within a few hundreds of years or less if you have exact match. Autosomal DNA didnt really help me so much in finding connections with people. I just dig in records and find the connection

