Speaking from experience (recently we rebuilt https://raku.org), I am sure that they will come back and optimize, but tbh this is not the priority with a new site where the hits will top out at ~ 10k / hour.
I am no great fan of animations, simpler is better imho - and I have resisted requests to add a sandbox to the Raku site since https://glot.io/new/raku does such a good job anyway... but I think Ruby is likely to appeal to a wider audience via a cool design vibe, whereas Raku is still in the early adopter / geek phase of adoption.
btw Ruby is a fantastic language!