Sudden decline of cameras as a photographic tools? (mirrorless, and an infographic)

You mention Pentax as a back handed slap.  Some facts:

There are 30 current lens offered from Pentax

There are 31 offered from Sigma for the K mount

There are 7 from Tamron

Plus a whole family of excellent manual lens currently being offered by other vendors and from past catalogs.

Seriously, if you can't find a set of lens in that offering to match your needs you need help.  And 4/3 and u4/3rds aren't close in offering that volume.

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“Your first 10,000 photographs are your worst.” – Henri Cartier-Bresson
That's over $5,000 worth of pictures using film....