https://developer.mozilla.org/en-US/docs/Glossary/blink_element

While initially popular, became much maligned because of overuse; many people found it annoying. More importantly, it degrades readability and can be particularly problematic for users with visual impairments or cognitive disorders such as epilepsy or ADHD. It can be disorienting or, in the worst cases, even trigger seizures.

tbf it's a valid reason to drop its support