It is NOT true that 4GB is underpowered for very common use cases. I used a 4GB Surface Pro 2017 with m3 cpu for months and it was perfectly responsive for email, lots and lots of open webpages, and a surprising amount of multi-tasking. I had no regrets.
The bad part was that I was seduced by its good performance into gradually adding mostly-work-related apps onto it until background processes increased and the registry aged-in, and then (but only then) did it bog down. I counted over 60 apps at that point, some of them demanding work apps. If I'd left it alone with home-related uses, it would've been fine.
I reset it and gave it to my daughter, who has used it fine for almost a year for email, web, MS Word music and light gaming. Even short video editing (slow rendering but fine for family shorts). No problems, very responsive.