I do both wargaming and scale modelling. Can’t say I have seen much growth in interest in 1:56 on the modelling communities like amorama and britmodeller.
1:48 is certain a popular growth area, but that has come from behind and still well behind 1:35 and 1:72.
I like 1:48, it is a sweet spot between size, price and detail, but I’m stuck with 1:35 because when I started there was barely any 1:48 to choose from and although the range has grown now I have a huge stash of 1:35 so a move to 1:48 is not realistic for me.
As for wargaming, I do 15mm, 20mm and 28mm depending on the scale of the order of battle. I love the plastic 28mm vehicles much prefer them over resin/metal. I am currently working on a warlord games 38(t) (italeri I assume) and a Rubicon T-26 1938. I love them, easy to work with a great detail for wargaming models. But I don’t think either would satisfy the scale modeller, too little detail, too few parts and dubious accuracy - I believe the Rubicon T-26 has some fundamental errors on the turret that would attract black marks on a scale review.
But fine for wargaming, you have to treat them for what them are. 28mm, simplified detail, not always accurate but great for the table top. 1:48 accurate and detailed scale models, but use them for wargaming and you’ll be leaving a trail of broken off parts behind its movement.
As for heroic figures and scale creep, this is absolutely true. The 15mm figures I have are closer to 18mm. They are often given exaggerated poses so you can tell what they are on the table from a distance. They are often made chunky so that they don’t break when your over-zealous team mate picks them up.
Cheers,
Nigel