I am surprised that Zwift doesn’t let you use decimal places when entering your weight in metric (or imperial, for that matter).
For those of using using Zwift to lose some weight, being able to update your progress frequently is really motivating. 1kg is quite a big chunk of weight. Come to think of it, so can 1lb be for some people.
By forcing people to update their weight whenever they lose 1kg, it means less accurate tracking.
As a user, I’d like to be able to enter and update my weight to 1 decimal place to better track my actual weight.
Switching to imperial gives you more granularity (e.g. 1lb is less of an increment than 1kg) but then the whole set-up operates in miles, which you might not want.