Yeah, pedal weight is all over the place. Almost 400 gm for some, 125 for others. I have three sets of lightweights coming
Ditto seat weight. Light saddles are nice for climbing, but can get tiring for hours at more upright sitting. That's a tricky one - balancing comfort vs weight. The older I get, the more I'll sacrifice a bit of weight for a bit more memory foam.
Right now I have a Velo Plush on there, and it's a bit porky. Ditto the inexpensive Schwinn seat post rack. I could easily take more than a lb off if I changed that stuff. But skeletal racks don't work on rear suspension bikes. All my hardtails have them tough.
I agree with the posters above who find 30 lbs a good target. Bikes seem much more responsive and fun when you get down to that point, and below