In 1997, before I owned a laptop, I visited my sister for a month. Took down my Power Mac 7100 and cables to connect a VGA monitor, depending on her to let me scavenge a monitor, an adaptible keyboard, and a mouse.
Even without it being wrapped in bubble wrap and a cardboard box, it was at least four times the height and weight of the “WallStreet” Powerbook laptop I bought in 1998. And it was useless until all the peripherals were hooked up.
In 2000, I visited my parents for a roughly comparable amount of time. By then I had my PowerBook, and at home it was connected to a large external monitor (giving me two screens total), external keyboard, external mouse, an external SCSI hard drive and multiple external removable storage devices (Zip and Jaz and Syquest, remember those?) not to mention an amp and huge external speakers, an inkjet printer, and an ethernet local network and a modem for going online. So, the epitome of “using it like a desktop”, right?
Unplug, unplug, unhook. Toss into computer satchel, out the door. At the airport, I could go online. Use it by itself, no peripherals needed. It’s light. It’s skinny.
I upgraded the hard drive several times and eventually added a second internal hard drive, upgraded the RAM to nearly 4x manufacturer’s max, upgraded the CPU from 300 MHz G3 to 500 MHz G4, and upgraded the screen hinges. Still not quite as innately upgradeable as a desktop but not at all bad for a laptop.
I still own it and it still boots and I make active use of it occasionally. Decently durable investment.
I just don’t see a compelling reason to buy a desktop computer when I can get 90% of what I’d want from one in a laptop along with that degree of portability.