Some interesting comment there, but not entirely in accordance with my distinct recollection of the contemporary situation in the UK, although I will accept that it is all too easy to focus on the highlights rather than the mundane realities of life. I stand by what I wrote elsewhere on this board recently:
'My memory of heels seen regularly in public in the (southern) UK in the late 50s - mid 60s was that 3 - 4" stiletto heels were everywhere, and worn by women of all ages. But 4 - 5" was by no means unusual; there were many styles in the high street shops and worn for both work and dressier occasions, again by women of all ages. Yes, shoes with a heel above 4.5" were not in every shop window and closet but they certainly existed - and none had platforms before around 1970. Happy memories!'
If one looks at the newspapers, newsreels, films, mail-order catalogues etc of that 'golden age', there is ample evidence of what I said was the situation - although I think there were some distinct differences between the UK and the US, with more restraint by women in the US as to what they wore. From observation, it seems as though US women took more pains to look 'elegant' in formal and semi-formal settings and had (or took) more opportunities to 'dress up', boosted by somewhat greater disposable income. But (film stars and the like aside), the typical US 'matron' at (say) a dinner party, restaurant or theatre would be less likely to wear the revealing dresses, tight skirts and 4"+ heels that were considered acceptable (and desirable) by a wide range of women in the UK. However, that was not everyday working or home-making attire for most women, although there was certainly a greater adoption of dressy rather than casual clothing - stockings, skirts and (modest) heels were almost universal unless precluded for reasons of safety or comfort. So, we see stilettos of at least 3" and up to 4" worn almost everywhere for many different activities by women of between (say) 15 and 60, including schoolgirls (out of uniform) and housewives buying the groceries. And I would emphasise that there were (mercifully) absolutely no platforms - they had disappeared by around 1950 and were not to reappear before 1970, then to create the illusion of much greater height-gain for a given rise.
Although significantly higher and thinner heels are (allegedly) currently less fashionable if not unfashionable, they are certainly still available in UK high street shops, quite apart from those widely offered online. I was recently in a large shopping mall where at least three shops stocked shoes and sandals with 4.5 - 5" stiletto heels (and little or no platform) alongside the equivalents with chunkier heels of anything from 2" to 5", again often with little or no platform. With the longer boots, however, there seemed to be a definite trend towards chunkier, but still often high, 'stacked' heels, although modest stiletto ankle boots were still on offer alongside their thicker-heeled counterparts. (Lots of wearable heeled boots for men to consider, if their feet were small enough!)