I think a lot of us were spoiled by the longevity of skaters who competed for 10+ years at the elite level. Unfortunately, with the state of women's (or rather girls') skating nowadays, longevity isn't common and doesn't seem to be as important as it once was. It's all about win as much as you can as fast as you can because once puberty hits, you'll likely have a year or two left before you are put out to pasture. The fact that Elizaveta Tuktamysheva won COR nearly 10 years after winning her first senior event is amazing and a testament to her longevity.
The Russians are pushing the sport technically and sort of ruining it fundamentally

. They are dominating right now. Yes, progress is great and it's cool to see the women's event have a few triple axels and quads...but ultimately what we end up with are half-baked young skaters winning the major titles. They may have the difficult jumps and spins but they lack skating skills/maturity/artistry/style/etc., things that tend to develop fully as a skater gets older. Before they have time to mature into a complete skater, two more 15 year old have popped up. Add to that the bad technique that doesn't age well and what you end up with is a bunch of "washed up" 17 and 18 year olds who are pushed to the back of the bunch, plagued with injuries or forced into retirement.
There are 18+ year old skaters who have excellent content on top of strong artistry, skating skills, etc. but, because they lack a quad or 3A, they are virtually shut out from the major titles or even a medal. For this reason I do think the age limit for seniors should be raised to 17 years old, but I doubt if that will ever happen.