I tend to agree. As I stated in my above post, I remember back in the mid-00s when it was perfectly fashionable for a woman to wear a tank top and not make any attempt to cover her bra straps. I wasn't a fan.
Part of the appeal of underwear is the private nature of them and what makes good EUF is the shame of being exposed in them. When there isn't that taboo, it loses impact. But that impact is clear in older movies. A woman getting stripped to her unmentionables wasn't just about cheap T&A. There was clearly a shame aspect to it that ran the gamut from simply embarrassed to downright humiliation, the latter often in exploitation and b-movies. The only mainstream films in the past 10 years I can think of that really hit on that level are the cargo hold scene in Iron Sky and the dress cutting scene in the Harley Quinn movie, the former being more toward the embarrassed side and the latter being more toward the humiliation side.
And also, whenever there is a stripping scene in contemporary media, the woman is often wearing "sexy" or "flirty" underwear. In other words, something that is meant to be seen. I'm a bigger fan of more demure lingerie choices and I think the 60s and the 80s were the two golden eras of women's undies (at least from a straight guy's perspective!). I favor stuff like 18-Hour bras and French cut briefs. It's why the secretary scene from Nutty Professor II is classic. She's not wearing some super low-plunge, sheer-cup, stripper wardrobe bra from the sexy lingerie store. She's wearing a basic white bra with some feminine detailing you'd find in the lingerie department at JCPenney.
I think a lot of Japanese films, particularly JAVs, still focus on showing underwear being super taboo, so I've started paying a lot more to them over Western fair. But I'll still search and mine older films for those gems!
TL, DR: Cultural and fashion progress is undermining my fetishy interests!