Internally-geared hubs (a.k.a. hub gears) practically eliminate the frequent, fiddly adjustments that derailleurs require. Day to day, they're practically set-it-and-forget-it, which is perfect for transportation and for leisure cycling. They're also different in every way: maintenance, shifting performance, gear range, cost, mechanical efficiency, weight...
To help you choose the right drivetrain _for you_, here's what I've learned after thousands of miles on both derailleur and IGH bikes.
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0:00 Intro
0:51 Overview: Derailleurs & Hub Gears
2:05 Maintenance
4:29 Shifting Performance
5:37 Gear Range vs. Cost
7:03 Mechanical Efficiency
7:57 Weight
8:25 Conclusion: Derailleur or Hub Gears?
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LINKS
Are Belt-Drive Bikes Worth It?: https://twowheelsbetter.net/are-belt-drive-bikes-worth-it/
Best Belt-Drive Commuter Bikes: https://twowheelsbetter.net/best-belt-drive-commuter-bikes/