I run on 16GB at work and 8 at home. At home I run into issues with large Factorio factories or if I have too many browser tabs open (tbh that's an issue with me, not with my system, but more RAM would be a workaround for it), but at work the amount feels quite luxurious. I never got close to running out even with multiple VMs running at the same time, so I don't really see the need for more than 16. Maybe specialized applications need it like machine learning or so? Though that would seem like something you'd do on a server instead of your local laptop.

Unless you're running close to full most of the time, I also don't think the extra disk caching more RAM allows for is generally worth it. I have a few GB free most of the time (both at home and at work) and that seems to suffice to cache whatever files I'm currently working with.

I have chrome, webstorm, datagrip, fusion 360, an android emulator and an ios emulator open at the same time and there is 0 lag ever.

Check how much swap you’re using. If it’s very little, the answer is “not very”.