Xcel can get up to level 9 skills. I grew up in MN where many of the clubs in the state offer no JO program. They have MAGA which is Midwest Amateur Gymnastics Association. MN has on of the biggest high school gymnastics programs in the country. Gymnasts are not allowed to compete High School gymnastics and club. Their coaches are not allowed to touch them in the off-season, which is nine months out of the year. Girls on as well as myself all competed level 8 and 9 skills and 3 off the girls on my team got college scholarships to D2- D3 schools in MN and WI. These girls were state champions in multiple school sports like Diving and Track. One was the state vault champion (did a cuervo that almost scored a perfect 10 one year) in a row and got a college scholarship in softball.
Doing this I was able to be a part of not only my high school gymnastics team, but I was a diver in the fall season, ran track in the spring, was in my school musical one year, and played club soccer. Xcel is set up and very similar to MAGA and is a great program. I do not know near as much about Prep Op.
The best part is that every single one of the 8 girls on my high school team are still involved with gymnastics. One owns her own club like me, the rest are either teaching club, high school, or judging. On top of their families and day jobs. There was no burn-out but we got to still compete at a high level and enjoy the sport all the way through high school and college for some.
My point is JO is not the only was to be successful in this sport. There are other options that can create happy healthy well rounded athletes and kids. JO is a fantastic program but it is not the right fit for many kids. I hope we continue to grow new options like Xcel for kids and families who would not thrive or do not want to commit to a program as intense as JO. That way we can make this sport into something that so many kids can enjoy for a long time. Not just the ones that would thrive in JO.
BTW this is not a debate on which program is better, I just wanted the OP to understand to check out her options and understand how her state works past the club level. The state I live in now does not have a strong high school program (numbers or very high level gymnastics) although I hope that changes with the addition of Xcel to the state. So in that instance if she is driven towards high levels you would want a club that offers JO higher than level 4. But if this is the way a lot of clubs do it because of the high school program than I would think she would still get great training at her current club because that their goal is to still feed into the high school program in the state.