Of the ones I do not use often, two because of weight, the other two because of the Norris adjuster and complexity. For some reason Norris adjusters and I do not work together well.
One of the difficulties for me with a Lie-Nielsen plane is there is almost no backlash in the blade adjustment. Funny that a 'feature' many complain about is something upon which I have become accustomed.
jtk
"A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty."
- Sir Winston Churchill (1874-1965)