But then you need to phisically carry it along with you everywhere you go, if you want to log into a service :/

And hope you don't lose it, or leave it in a pocket when you do the laundry, or plug it into a faulty USB port that zaps it, etc.

	▲	vel0city 10 minutes ago \| parent [-]
		My yubikeys have survived dips in the ocean, spilled beers, run over by cars, dropped in pans of used motor oil, left out in thunderstorms, and multiple trips through the washer and dryer. They're still fine even after a decade.