What specific kinds of development are you doing? Enterprise CRUD software? SaaS? Data science? ML?
Just in review, I got a system 76 with pop os as the daily driver. I do a lot of ML and also game on it in my free time, so having a desktop 2080ti in a laptop chassis was nice.
However, a major complaint I have is battery life. It's not just the ridiculous GPU, it's also that linux is apparently shit when it comes to power management. If you want to mobile compute and apparently you do, you might consider a thorough investigation into battery life as a part of your requirements.
Mine is great as a mobile workstation machine, but the battery life prevents me from enjoying cafe style programming.