Maybe she will burn-out in five years. Maybe she'll slow down and others will catch up. Maybe she won't pass the score out. I don't really know. She seems really happy with the accelerated path and the skills she is learning right now.
I agree with this. I think it really depends on the kid. My dd started competing L5 at 8 and was a TOPs kid. She is now 13 and L10. Some may say that she is "fast-tracked" but that was just the way she progressed. She might have been bored and quit if she had been held back just to stick to an arbitrary rule about progression. She broke her foot at L9, true, but it wasn't an injury from some crazy skill that she was pushed to do, it was just a weird foot placement on the edge of a mat. My point is this - I've seen first year 10s who are seniors get burnt out and/or injured, too. Many, many kids get tired of all of the hours somewhere around 12-16 and it has nothing to do with how hard they have been pushed or "fast tracked" they just are done, or bored, or feel they've reached their limit in skill acquisition.
I know that there are kids who are being pushed beyond their limit, and that is sad. I feel that homeschooling for gym because your L5 won states is crazy, and it definitely happens! This is a trend not just in gymnastics, but in all youth sports, bordering on obsession in the US in my opinion. It is virtually always the parents I hear talking about what team their kid should be on, and what scores they got, and what colleges they want to get in to. Most of those kids DO break from the pressure and quit. My dd might get to college or she might not, but she has no clue what she even wants to do let alone what school she wants to go, and the fact that she happens to be pretty good at her sport doesn't mean that is the driving factor. It doesn't mean she is homeschooled or coerced or anything, she just loves it and has been successful. In most cases, I have found that if the parent lets the child take the lead with their sport, and not vice versa, they will end up with a happy child that is where they need/want to be.
However, I don't think generally speaking, it is the over the top pushing causing the kids to get better faster in gymnastics
specifically. No amount of parental or coach insanity can make a child catch a tkachev or throw a double pike on floor. Training and equipment has gotten way more advanced in the last 15-20 years or so, and the number of excellent clubs/coaches has skyrocketed. So, the number of girls that have access to a quality program that helps them progress has gone up, and you see a greater number of more capable gymnasts overall. But no matter how many good gyms there are, you will still see only a tiny fraction of the L4s make it to L10 or beyond.