USB-C can’t charge nearly as quickly as a high power proprietary charger. In use USB-C needs to supply power for both charging and operating the laptop, so what might take 3 hours to charge with USB-C might take 20 minutes to charge with a dedicated connector.

That’s not to say every laptop’s proprietary charger will supply noticeably more than 100W, but many examples exist.

I'd be surprised if a 13" Surface doesn't charge well enough at 100W, though.

13” Surface laptops had up to 90Wh of battery. Batteries get hot when charging due to inefficiency, meaning it takes more than 90Wh to charge a 90Wh battery. Subtract the power demand while in use and your well over an hour to fully charge.

By comparison a quick charge to 80% in under 20 minutes while under full load should be possible assuming sufficient cooling and power. That’s not a huge deal most of the time, but it’s still plenty useful if your sharing a single outlet etc.

I’m sorry, what laptop charger has a brick that’s over 100W?

Here’s a 230W example: https://www.amazon.com/Charger-Adapter-GTX1070-RTX2070-RTX20...

Their still common with gaming laptops like Razor 15’s. It’s ancient at this point, but a friend used to have a dual GPU laptop that used 2 different AC adapters at the same time.

There are some. Thinkpads can go to 135 and if I recall correctly, maybe even 170W.

The bricks weigh as much as an ultrabook, though :-D