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Yeah I think the outliers thing is always going to be an issue but seeing how things are on a bell curve etc I found helpful, but you'd also hope someone using a tool like that has at least some interest in accuracy and in aggregate should strip out a decent chuck of device variance and the weight stuff it's only really useful if it's accurate, so should have less of the Zwift disincentive around weight accuracy.
I guess for personal purposes it works well.
If you’re snooping other people’s data, it could be wildly out based on their input weight, FTP, bike weight, trainer/power meter accuracy etc.