I hope somebody figures out at some point how to do roofing with large integrated panels that could be solar.

Yeah, BlueScope Steel (Australia) did this with three separate prototype designs from 2012 - 2015 that were manufactured, installed and currently have had a decade of all weather on house trials.

The Australian market is largely adding trad PV panels to existing housing, but there are signs of greater uptake of integrated PV + weather proof + thermal insulation roofing panels by architects and hopefully will be seen more on new mass produced housing plans.

~ https://arena.gov.au/projects/integrated-pv-solar-roofing/

This Estonian companies does that https://roofit.solar/