Another strange thing about "boat missers", that is less common these days is that they used to always claimed that buying 1 whole bitcoin is now too expensive for them as if you only had one choice and that was buying a whole bitcoin and fractions of a bitcoin were never possible!
You still see it quite a lot, but yea the environmental argument has been getting a lot more traction recently. I guess it's simply due to the fact that "bitcoin is bad for environment" is a lot easier to grasp for the masses, whereas the scam argument takes a slight bit of brainpower lol.
Maybe it is just that they lost their biggest FUD that involved China ("China controls bitcoin" then "China banned bitcoin, bitcoin is gonna die"), so now they need another replacement.