Should I choose 1x or 2x drivetrain for all-road riding?

It depends on your road-to-gravel ratio. If you spend more than 60% of your time on pavement, 2x offers tighter gear steps that make road cadence matching easier and provides both lower climbing gears and higher top gears simultaneously. If you spend more than 60% on gravel, 1x simplifies shifting, improves chain retention on rough terrain, and eliminates front derailleur maintenance. For a true 50/50 split, either works well — choose based on whether you value simplicity (1x) or gear precision (2x).