Your use-case says "ARM laptop" to me.

Pros: Get some kind of SoC laptop, and never worry about battery charge again. They're also lighter-weight and better at thermal management. Right now, Linux on ARM is still kind of fledgling so there's not as many apps made to run on ARM natively; the upside is that since there's not as many possible combinations of hardware, there aren't nearly as many edge case bugs and issues.

Cons: If you want youtube in 1080p+ and 60 fps or if you want to use Visual Studio (instead of something lighter-weight), you'll either want the most powerful SoC laptop on the market (probably something by Apple), or not SoC at all. Same goes if you want to have like 5+ programs opened at once and 10+ tabs open on firefox. If you're on the opposite side with me and don't mind if the video is 30 fps or the resolution is 720i and using vim as an IDE, you can get away with something dirt cheap. The other downside of course being the inability to upgrade hardware, which goes hand-in-hand with the reduced hardware combinations aforementioned. Also, since it's not as widely adopted/developed, there are more standard case bugs/issues.

It does force a more minimal approach to computing—it's not powerful, and it's on the lower-end of ARM laptops—but my Pinebook has only done well by me. The security/privacy factor of Pine was also a big plus.