Why hasn't Sony made these 5 lenses, after 15 years and 82 lenses in its E-mount lineup?

Sony E-mount lens line-up at 10th anniversary of the lens series.

With the announcement of its new 100mm 1.4x Macro lens, the range of Sony E-mount lenses now totals 82. That's a pretty amazing offering, by any measure, and it covers everything from ultra-wide 10mm lenses for APS-C bodies to $12,000 full-frame telephotos for sports (check out the full list below).

And yet, while 80+ lenses is nothing to scoff at, there are still some significant gaps – and I'm not entirely sure why.