Desktop browsers tend to render fonts at 16px by default. There is a rationale for reasonably large defaults: anything else risks alienating a huge swath of users, many from older populations whose eyesight has deteriorated. “But my audience is young and hip!” I hear you say. Sure, but generous font sizes don’t offend young, keen-eyed folks. The key to inclusive design isn’t to target specific groups, it’s to not exclude groups arbitrarily — there’s nothing to gain.