Framework 16 is way too bulky. I would like a laptop with a similar form-factor to ThinkPad P1.

But Thinkpad P1 is 15.6"? That's very close to the Framework 16.

Thinkpad P1: W 361.8mm x D 245.7mm x H 18.4mm

Framework 16: W 356.58mm x D 270.00mm x H 17.95mm

The Framework 13 roughly matches 14" laptops from other manufacturers. It's really a 13.5", and has a taller aspect ratio than typical.