Nonsense. I could easily do all that he described with my old 2012 MacBook Air with 4GB of Ram. 8GB is plenty. That being said, if the OP has money to burn and feels better about it, then 16GB definitely won't hurt.
That's like telling somebody a HDD is "plenty" and upgrading to an SSD is nonsense, because you have a 10 year old computer that works "fine". Will a M1 MBA with 8GB of ram work? Yes, most of the time, (except if do some heavy editing in Adobe suite and similar, then the OS will literally close the program for you with an error). But it definitely won't work as well as it could outside of absolutely light use. With a dozen heavier tabs in safari, just the browser can use >4GB of RAM and a single Netflix tab can easily be >1.5GB. Now add some electron apps like spotify, Word and the ~4GB the OS uses by itself and you are well into the spinning wheel territory and some lags when swiping between desktops and apps, even with the lightning fast swap on M1 Macs. If you are upgrading from an older mac, this might still be a greatly superior experience, but it definitely could be better with more RAM. And this is today, in 2021. Now add even hungrier apps and websites over the span of a couple of years and a behemoth like Microsoft Teams or some other software you might need or get into and you are seeing slowdowns in normal, daily, light use.
Go check how many youtubers who praised the 8GB model swapped them for the 16GB ones a week or 2 after release, do some scrolling through the "is 8GB enough for M1" threads on here, with people being unhappy after the initial glow wears off and actually using the laptops, and think why 16GB MBA and MBP models have a multi-week delivery time, but the 8GB models are discounted an extra $50 every week at every retailer.
To be honest, at least the absolutely brain-dead "8GB RAM on M1 == 16GB on Intel" misinformation campaign seems to have died out, with not even a single mention in this thread, thank god for that.
P.S.
@usagora One of my favorite phenomena on this forum is seeing people rave about the lightening speed of their 10 years+ old macbooks, where 4GB RAM is PLENTY, 2 cores, 1.8GHz is MORE THAN ENOUGH and lags DO NOT EXIST, but inexplicably their old laptops become overheating slow pieces of garbage the moment they touch a shiny new AS computer. I'll be awaiting your inevitable posts