I've come around to thinking 3d printing may actually become an issue for GW. It's no longer particularly expensive or difficult (it's not 'a hobby in itself' any more than owning a car), and influencers seem to have taken them on board as a thing to have.
The same happened with airbrushes, and GW got away with not producing one (although they did start producing paints for them), but I think the difference is the cost savings. With an airbrush, maybe you save a little on paint, I don't know. Who cares. With a 3d printer, you can save a *lot*, extremely fast. If someone starts selling expert-level golf clubs for $10, the people selling beginner clubs for $100 maybe have a problem. Like, maybe beginners can't get the clubs at first, maybe they need some kind of special storage or whatever. But it's gonna feel real bad to be stuck paying for them.
3d printing won't become an issue for GW.
Two things I think older gamers (even those in their 30s) need to realise - Kids are GW's main customers and they don't stay in the hobby for long. Now, bearing that in mind...
Sure you can save money in the very long run with 3d printing, if you never buy GW stuff ever again, if you're willing to sacrifice a little quality in sculpts over GW figures, if none of your prints fail, and if you print an absolute ton of stuff. Also, you need a well ventilated space, especially for resin, along with wash and curing spaces, and the learning curve is still high, despite what influencers would have you think - for example, Pat from The Painting Phase had to get "an expert" in to get started! Start up cost is anywhere between £200 and £1000s depending on the quality of 3d printer you want.
However, lets say, like Pat from The Painting Phase, I have never 3d printed, and I want to print 10 knock-off Space Marine squads, lets say Intercessors, 100 figures. I've spent £500 on a "midrange"ish 3d printer (they were given £1000+ of equipment), I've got it in a well ventilated room, I've made my own curing and wash stations. STL file cost me £20 lets say.
That's a total of £520 + whatever it cost me to make my own curer/washer, cost of resin, cost of alcohol for washing, the small amount on the leccy bill, and time to learn what I'm doing. And that's if no print fails, and the sculpt quality may or may not be as good as GW.
In the meantime I could have gone to GW and bought 10 actual Space Marine squads for £375 + shipping or travel costs. Or less from 3rd party discounters.
I'd have to print roughly 161 Intercessors just to break even. So, from scratch, where would I be saving money exactly...
Sorry, but that's the reality, if you don't already own a 3d print setup, different matter perhaps if you're starting by printing large stuff like tanks.
The majority of gamers do not own a 3d printer - again, they're kids, and mummy and daddy won't buy them one. It's those gamers GW aim their product at. For those gamers to suddenly start 3d printing it would have to become as plug and play and non-toxic as having an inkjet printer, it's not and is unlikely to be given the products used (resin, alcohol etc.), and as those gamers want GW figures, not "close enough" figures, GW would start selling stl files.
Possibly a different matter if we talk about people selling their 3d prints as a business or "side hustle", but they aren't selling to the masses, so unlikely to dent GW.
Your golf club analogy is nonsense, airbrushes are a good example of that. Iwata and Harder & Steenbeck, two of the "top" brands sell their airbrushes, your expert golf clubs, for upwards of £100, many north of £200. Cheap Chinese clones, your £10 golf club, have barely made a dent in "top" brand airbrush sales. What the cheap £10 golf clubs, in this case Chinese airbrushes, have done is make golf, airbrushing, more accessible.
GW haven't made an airbrush (the flamer spray gun doesn't count) because, again, they're not aiming at that end of the hobby trumpet. 99.9% of gamers don't use an airbrush, and other companies already make airbrushes, so GW wouldn't be able to compete on price - no-one in their right mind is going to pay a GW "added value, i.e. GW branding" price for a decent entry level airbrush (Iwata Neo or H&S Ultra for example) when they can buy the original for less elsewhere.
Seriously, y'all, again, go watch on youtube The Painting Phase's two videos with ex-GW product dev Tom Hibbard, and do yourself a favour, realise you're thinking myopic nonsense.