Observations:
First month with M2 Mac Mini, 8GB RAM, 512 GB SSD
It's a perfect Mac for me with Studio Display. This monitor is prohibitively expensive but extremely worth every penny.
Running apps: Pixelmator Pro, Safari and Firefox (both with 3-5 tabs), Music, iMessage, Mail, Finder, Notes, Obsidian and Mattermost. I'm sure I forgot some other background apps.
Result:
No lags, snappy as it should be. Not a single sound of a fan. No heating.
A bit later (Pixelmator Pro closed):
After a while wile using the Mac further, it was like this:
After a while like this:
Closing some apps and after a while like this:
Currently, I am like this:
*Mac mini is occasionally used by another user with its account, also this Mac hasn't been restarted since doing all this above.
I would say, don't bother with Activity Monitor. And 8/512 or 8/256 is more than enough for my needs. The swap is normal and I am not concerned. The max swap used I've seen was around 4 GB. Nothing to worry about. Happy swapping.
The only thing I've noticed is that when I unlock the Mac mini, my Logitech MX3 mouse is not active right away. It needs a second or two.
For now, I can say, save your money if you don't need your Mac for some special professional work. And don't bother with longevity unless you already know you are buying a Mac for more than 5 or 6 years. In that case, maybe I would go with 16 GB RAM (and 512 SSD). Otherwise, trade in, sell or give to someone you know who needs a computer desperately and upgrade your desktop with another base model after a few years.
Enjoy your Mac!