What to do about 'prefers-reduced-motion'?

[schne324]

• should this be enforced? opt-in?
• should it be up to implementer?
• should hang-tight render non-motion alternatives?

see https://drafts.csswg.org/mediaqueries-5/#prefers-reduced-motion

[schne324]

@media (prefers-reduced-motion: reduce) {
  /* Disable animations */
}