If you're used to Mac and you've got the budget, stick with Mac - the new MacBook Pro with M4 chips are really solid for fullstack dev, Docker runs smooth and you'll never have issues with multiple tabs and VSCode open. Now if you want to explore Windows, a ThinkPad or Dell XPS will do the job easily, but you gotta be aware that you might need to tinker a bit more with configs (WSL2 is cool but it's still a compromise). Linux straight on the laptop is great for dev, just make sure to check hardware compatibility before buying. At the end of the day it's mostly about being comfortable with the OS and how much budget you want to put in.