ORIGINAL: Astorax
You are counting pitiful as a total tech boost. Fine. It only jumps me several components of ONE tech field. Fine. I'll take that and I don't think it pitiful. It might not be as much as one would think it should give but its a huge boost all at once. Especially in the early game.
I have never jumped a single tech level from disassembly, ever.
I do disassemble all ships, religiously... I just keep them until the last minute before disassembly. And it never levels up anything when doing so.
Maybe if you had level 1 everything and then disassembled a really awesome capital ship...but that is a huge humongous waste.
As I said, it probably depends on the research rate. But still, if your research rate is set higher then you don't actually need it anyways.
In regards to "Never trade" thing... In a recent game I had 50 planets, there were two empires with about 30, and then a bunch of small dogs.. I sold my my (non racial but still very advanced) tech for cash to every other empire for every last credit they had... end result? 700K credits... which I used to build 100 colony ships (7000 each) via the colonization window. (I prioritized... mostly)... less than 3 minutes later I had 150 planets...
The game ran for about 10 minutes (my state went a little bankrupt for a while because of auto hiring of troops... but it recovered as the new planets became productive)
Then I went on a new round of selling... this time I sold tech to anyone who would buy it for nearly a million... and used it to build 150 more ships...
I now have 300 planets when the second largest empire managed to go from 30 to 35...
Guess who just won the game... by selling tech!
I do not have a superman complex; for I am God, not Superman.