I've been experimenting with various amounts of memory from 8 to 128 GB with both Windows and MacOS. While 8 GB of RAM is only enough for light tasks in the browser - 16 GB is pretty much the minimum for work.
Since I'm working with Web, API and Mobile applications, I want to quicly jump through them on-the-fly while developing. I'm also using Photoshop once in a while to edit various assets for applications. Here I think 32 GB is mandatory, unless you don't need great performance and in the same time want to reduce your SSD life-time with Memory Caching to disk.
While also running both Windows and Linux VMs to test native applications for those platforms 64 GB begins to be just enough and I saw OS was swapping a lot to the disk.
While also running 2 VMs (each with 16 GB memory) - 128 GB starting to be just enough...
Are you heavily multi-task'ink? How much RAM do you have? Would be awesome to hear about your workflow.
No matter how much RAM you have, your system will end up using it all, especially Mac 😊 But for my workflow, I have laptop with 8GB quite ok for light work, desktop could use more ram though. I do multi task a lot so like 64GB I suspect enough without any VMs. I don't do those, I rather use cloud VMs.