We launched an internal webapp five years ago and had recurring issues with people running default browsers on Android or out of date versions of Chrome. We needed to troubleshoot this faster and more automatically. We'd been directing people to whatismybrowser.com as part of the original process to read us back their browser details which was much more effective than straight up asking people what their browser / version as.
After we found the API, we were able to automate an interaction which typically took us 20 minutes of back and forth and eliminate the issue entirely.
It's been running seamlessly for five years and since then we haven't had to worry about a common scenario that used to crush our support staff in the early days.