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hamrack
1x8 is really simple, put a 39t chainring and the whole gear range will be use right down to the 11t (this way the sprocket wear will be more even rather than the top/middle portion) unless where you are is pretty flat, then 42t sufficent.
Defintely lighter and felt a lots more direct in all the cassette range, only downside is not being able to shift while waiting in traffic, even the heaviest rear wheel is still lighter than the IGH.
Only disadvantage is replacing the chain and cassette a little more fequency than an IGH.