I see Offset Mode is getting some attention again....
Personally, I've used Offset Mode on just about every project that has automation, for just about as long as we've had it. While lasso-ing and moving automation is certainly doable, it's still the precision factor for me - I can press "O", move a fader, and press "O" again way faster and with more accuracy than I can grab every node and line and then drag it. Plus, I'm more confident in the change knowing that there's nothing to "miss" in the process. I did intentionally try the "select all automation" workflow last night just for kicks, and found that I had to re-select two additional times because I kept missing nodes. Score one for needing better size control over lanes...
Another factor that can come into play is control surfaces w/ moving faders. Adjusting a fader while in automation mode is meaningless if that software fader has automation - the hardware fader will simply snap back to where the automation tells it to be. By using Offset mode the hardware fader becomes temporarily available.
One last example... say you had four sequential tracks with volume automation, but wanted to reduce the volume of all four by 1dB. You could adjust the downstream bus if there is one, but if there's not, or if other tracks are also output to that bus but don't need to be adjusted - press "O", drag+select all four tracks, Ctrl+Drag one fader down by 1dB, press "O". As with all things these days, YMMV.