"CRT aesthetics" posters will have you convinced old games were made for CRTs and you can't play them the right way without one, and then insist on only playing games using professional broadcast monitors that 0% of game players in the 80s/90s had access to
And then they'll pull out a (carefully curated) image of the Wizardry skeleton or the Sonic the Hedgehog waterfall to prove to you that developers at the time lovingly handcrafted every last pixel with the CRT TV's inherent graininess in mind, despite the available evidence to the contrary.