On a warm day, I take my laptop out to my picnic table on the deck (hint: on a bright sunny day, use an empty cardboard box turned on its side to reduce sun glare.
A 15-inch screen is perfect for a laptop.
If you don’t need a laptop, then the desktop is the way to go.
A desk top is easy to keep upgrading, you don’t waste money on a battery that will die in time anyway, and overheating isn’t an issue.
Laptops are for people who either need the mobility, or who replace their computers periodically.