[LIV2]

I am, and I have made a few popular designs.

I would consider it absolutely unnecessary, and invariably results in something that is unreliable at best.

Do you have examples that show how it is essential?

[phendrenad2]

You'd route 100+ signals by hand on a two-layer board? You either have too much money or too much time.

[LIV2]

Yes I have done so several times. 2 layer and 4 layer.

I can't see how it would cost me money to do so, on the other hand if I was to blindly autoroute my designs i'd spend more time troubleshooting and way more money doing several revisions before I got something stable.