I have 16GB. I have docker running 5 containers, 3 PHPStorm windows (with multiple tabs open), Orion with 17 tabs open, Slack, Fork, Sequel Ace, iTerm2 with multiple tabs (one of them running a vite server), and Calendar.app.

Memory pressure is in the green, "using" 11GB (App: 6, Wired: 2, Compressed: 3). Not swapping at all.

Slack, which as you mentioned has "Slack Helper (Renderer)" uses 250MB.

Even with 8GB this would still work perfectly fine. Biggest user is PHPStorm with 4GB.