"even not particularly addictive when not delivered via burning leaves"
My personal experience is that it is even more addictive. First, with NRT (gum, lozenge) you can use nicotine much more frequently - e.g. even going to bed with lozenge in your mouth. Second, you can easily increase your dosage. 2mg piece of gum not doing it for you? Pop in a few more or move up to 4mg. Switch to mini-lozenge and you can suck on say 5 * 4mg lozenges at one time.
My personal experience is that it is even more addictive. First, with NRT (gum, lozenge) you can use nicotine much more frequently - e.g. even going to bed with lozenge in your mouth. Second, you can easily increase your dosage. 2mg piece of gum not doing it for you? Pop in a few more or move up to 4mg. Switch to mini-lozenge and you can suck on say 5 * 4mg lozenges at one time.