My vibe from people my age is that for personal and mixed personal/business devices that aren’t particularly “tech-minded” is that they feel they don’t need a full laptop anymore and are going for more portable devices. Meaning iPad.
Generally 8 works for me but I do sometimes end up needing more. At which point I curse my financial situation when I had to purchase my computer which I am otherwise happy with.
98% of users can live with 8 just fine, and 16 is great. 32 is a waste for most folks.