The samsung fold7 in particular is the same thickness/weight as slab phones, but unfolds to become a tablet. Please don't vote if you haven't held one. The compromise is cost, durability (dust, water), some battery life & some camera. Huge gains in productivity and night-to-day difference consuming video and photos. Google Maps FTW.
Not just dust and water but folding screens are plastic with a mohs hardness of 2-3, as opposed to normal phones with glass screens which are a 6-7 hardness. I like having phones that can't be permanently damaged by pressing my fingernail a little hard into it.
Example: https://www.youtube.com/watch?v=8hgg4YEdPak&t=140s
Another example: https://www.youtube.com/watch?v=8uS90jakOuw&t=107s
I also can trivially replace the screen on my regular phone at home, whereas I'd have to get a folding phone professionally repaired for many hundreds of dollars.