One issue that keeps innovations like CSS animations under the radar is that there isn't much explanation available for those who want to try out the newer methods. Too few people have explored the alternative. Thankfully, individuals like the web designer mentioned at the start are sharing up their methods on CodePen and similar sites.
Someday the ultimate solution will present itself. It will offer a simple way to code animations that does not have a negative impact on the UI/UX of a website. Until then it is up to designers to continue the progressive explorations of new methods. For more information click here https://i.redd.it/smdhtprtdzj41.gif.