In 115 pages, I’m sure my unpopular opinions have already been said, but I’ll take a stab anyway.
1. I dislike most tactile switches where the click is an affectation and not an inherent aspect of the actuation mechanism.
2. Much like some people complain that keyboards are held back by clinging to outmoded remnants of the past (staggered rows, QWERTY layout, etc.), the same can be said for MX-style stems and switch housings.
3. (Possibly the most unpopular) There is too much choice in the market these days. It’s nearly impossible for even a very active member of the community to make a fully informed decision or offer fully informed advice. Choice paralysis is a real thing, and I know more than one person who gave up on buying a mechanical keyboard because of how many options there are.
4. Most ergonomic keyboards … aren’t. In fact, some are arguably worse in certain regards.
5. While they are undeniably massive, the height of a beamspring keyboard is a non-issue if you can adjust your seat height or desk height. If you can fit a fullsize keyboard, you are almost certainly fine with any of them save perhaps for the Displaywriter/Beamship (though they’re < 2” wider than a Model M).
6. Beamsprings are fantastic switches. But they aren’t “godly”, nor are you guaranteed to prefer them over a Model M/F. They certainly aren’t worth anywhere near $1500+. (I would know. I own one, purchased for $300 including controller.)
7. The community is too hyperbolic. Switches aren’t merely “okay”, they’re “trash”. They aren’t “preferred”, but “godly”. This goes for case designs, keycap materials, colorways, etc. etc. (And this is a complaint that could probably be leveled at society at large, not just the community.)