A complicating factor on the telemetry is that both this new "guess" option and its predecessor list are/were in the menubar View menu and have no way to be accessed through the "hamburger," so there wasn't a default-visible way to get to this functionality for Windows and Linux users.
This is a pretty familiar pattern for controversial telemetry-based browser decisions, first making the feature more obscure or hidden, then later noting that few people are using it when justifying change/removal. How many users just abandoned a site they used to use or switched browsers is not captured in the telemetry (though options to switch to that still offer this feature are pretty thin on the ground).
To be clear I don't think this was a "blind" telemetry decision; the developer seems to have done a pretty thoughtful and thorough analysis about it. But you see the pattern of such changes over the years and you start to imagine there's a thumb on the scale...
This is a pretty familiar pattern for controversial telemetry-based browser decisions, first making the feature more obscure or hidden, then later noting that few people are using it when justifying change/removal. How many users just abandoned a site they used to use or switched browsers is not captured in the telemetry (though options to switch to that still offer this feature are pretty thin on the ground).
To be clear I don't think this was a "blind" telemetry decision; the developer seems to have done a pretty thoughtful and thorough analysis about it. But you see the pattern of such changes over the years and you start to imagine there's a thumb on the scale...