Pros: The best development experience you can have. Everything is native linux. There is no beating that. This of course will be a problem if hobbies/work use windows. I've never been a windows person. So I've never missed it. Power and peripherals work on the system76 seamlessly.
Cons: Battery life. Runs out in about 2.5 hrs but its an AMD not an ARM.
I did run linux on a tower exclusively while I did my PhD. Did everything on it - code, writing my thesis in LaTeX, store data, connect to dropbox for backup, watch netflix, etc.
You're not missing much by dumping windows.