Tim S, you're giving us references that are entirely driven, written, and published by small-bore nuts. It's just opinion.
The Saubier forums are hardly any different than TFL. It's just a bunch of guys on the internet... that happen to like small calibers (biased
). I've been a member on those forums since 2007, when I was first trying to track down some .17 and/or .22 CCM brass. Even if they created the biggest loser of a cartridge, of the last century; the guys on the Saubier forums would still praise it, because it's small caliber.
I'm not seeing the revolution.
All I've seen, is more former .17 caliber shooters switching to .20 caliber, because the .204 Ruger (and resurrection of 5mm Rem Mag) gave them a better selection of projectiles. When Hornady releases a few new bullets to support their factory offerings of .17 Hornet, those shooters will drop the .20 caliber cartridges.
If you like the .20s, that's fine.
If you think it's the greatest thing since sliced bread, that's fine.
....But .20 caliber doesn't make sense, for many of us.
And it isn't a revolution, unless it turns the world upside down. Right now, the only world that has been effected, is that of the small bore guys that are playing "musical barrels" with their rifles.