Just like Gun Culture 1.0 ignored the changes leading to 2.0 the indicators are there if you shake off the culture you are stuck in.
Are we in 3.0, yes, and from the 3.0 perspective going retro isn't the trend. Muzzleloading and precision? Hardly. The trends right now are AR pistols, SBR's, rifle and pistol caliber submachine guns, and suppressors. Of the trending commentary over the last two years, the legality of the Brace on AR pistols has been more extensive than somebodies concern about a new way to use a muzzle loader - if anything those already had their peak technology period some 5 years ago. The introduction of inlines, compressed solid charges, sabots, and fast reloading is winding down. It's about all you can find on the shelf anymore. Interest in muzzleloading is actually on the decline now.
Goes to which Culture one is looking from - and looking from 3.0, having purchased an HK91 in 1976, with red dot, to now, hunting exclusively with an AR pistol in 5.56, I see different trends in the future. One will be more traditional metal framed guns. Yes, they are expensive, but saying the AR15 is "souless" comes from a 1.0 perspective - guns don't need wood on them. The biggest demand from trendsetters is buying metal framed guns - CZ's, 1911's, S&W 3Gens. Plastic might be nice for carry but that demand is coming from NEW CCW shooters, not the trendsetters looking for something else. Especially another black plastic gun. Seen one seen them all. A stainless 4566TSW, tho, now, that be different. So is a CZ75 or a compact. And so is a AR pistol with Shockwave blade.
What we will also see is more capacity shooting, not long distance precision shooting. What is the current leading edge trigger out there? BINARY - shoots on pull and release. What is the leading edge political target? Rescinding the NFA, chipping away at it by removing silencers from enforcement and tax restricted purchasing. Again - Culture - and you won't see people advocating that if they aren't leading edge 3.0. Bluntly, 1.0/2.0 won't even consider it and are the internal enemy who won't get out to the way. They are still an impediment to progress.
We will be full 4.0 when I can go to the range and practice with my AR with binary trigger and Brace - with a lane built just for that, and no "Timed firing is required" warnings. If I want to blow away a 60 round mag in 8 round bursts at 50 feet then that is my goal, and there are a lot of others already doing it - with no stamps or machine guns. Why in the world would I want that? Because each version of gun culture increases the level of "Don't tell me I can't get it." Full autos are selling for $10,000 and up yet they are still in demand, the AR pistol is the workaround for owning an SBR TODAY, not when a Stamp finally arrives, and binary is the workaround for the Hatch Act. Every generation takes what the previous barely allowed and ratchets it up to excess.
The pinnacle of Gun Culture 4.0 will be the day you can buy a full auto HK MP5 clone legally as an impulse purchase, walk out the door in one hour and it's actually "affordable," too. And the previous gen Fudds will be the biggest complainers.