I'm just pondering, and you may well be right. I will absolutely concede that.I don't see this ever making conventional brass cartridges obsolete in any way. I am excited about it, but I must say I agree to disagree with you about fear. People might not be a fan of it or say it's hype or just not for them, but I can't really see anybody afraid of this thing being successful.
After all, the .22 rimfire is still the most sold and chambered cartridge on earth by a mile…very very old tech, a heeled bullet, unremarkable performance…but it works dang it and it's never going to leave. People still shoot blackpowder haha. We have e-bikes but bicycles still exist…Brass cases are extremely proven and I don't see them ever leaving, but more options and more performance to be realized is always welcome. I see this class of cartridges as perhaps complimenting the existing lineup of well established guns and ammo, not at all replacing them, ever.
PS, I looked back over our sales records at the gun store I work at…we're mainly just hunting rifles and shotguns. - and in the last 14 months the .30-06 Springfield is STILL the number one chambering we sell for new production centerfire rifles. None of the new kids have dethroned the king, at least not around here.
We don't reload 22 lr either and as you said it has incredible staying power.
Perhaps a steel cased 22 lr that clocks at 2200 fps? Maybe more? Who would pass on that?
.30-06 doing unthinkable velocities?
All I'm saying is be open to the inevitability of progress. Dudes running black powder and pounding round lead balls down their barrels could never imagine where we are now.