Remote working is slightly skewed towards workers who are under the age of 40 primarily in the UK, Germany, and China. In the US and Japan, there is less of an age difference. This reflects the digital capabilities of younger adults as well as the labor practices of countries. There is a difference, however, for those who always work remotely, whereas in the US and Germany, there is a stronger skew towards older workers.
This MetaFAQs reports on how often remote workers work remotely by age group and country.