I don't know Warhammer that well, but I see a lot of 3D printing for historical wargames. Seems popular for naval wargames for instance, but I saw many printed tanks as well. Not so much small scale infantry perhaps. There are so many very specific models that can be needed for historical scenarios that mass-production can't provide everything. Some companies of course print models on demand now, but others sell STL…
The big difference in the historical wargame space is that there's no way to trademark Alexander the Great. Anyone can make the minis, whether it's a small-but-awesome company (Victrix! Wargames Atlantic!) or a dude with a 3d printer. As a result, there's some separation between people who write rules (which you can buy as books or PDFs) and people who make minis. The people making minis actually compete on price and quality, and we get fsck'ing awesome minis for ludicrously low prices as a result. Victrix is often $1-$2 per mini, often about a tenth of the price of GW.
I use an fdm printer for terrain, which is a complete game changer. It has none of the problems of resin, and you want big stuff for terrain and care a bit less about layer lines. It's awesome.
The only problem is that only a small corner of the miniatures wargame world plays historicals. :)
(So feel free to ping me if you're in sf/East Bay and want to roll dice sometime.)