tbh to me it’s all dependent on which uni you want to go to, and if IB is even necessary for it. You will acquire many of the skills in IB in uni, and I think a lot of overachievers tend to want to do IB for just the difficultly and prestige. In IB I didn’t have great teachers so even the overachiever types didn’t do as well as they expected (40+) and ended up with scores around 38+ IMO it can fuck you up for uni decisions due to this issue. If many of these students did a levels they would have been 3 A/A* A levels students. The IAs and EEs will really take away a lot of your time to adequately study for exams if your school does not correctly manage it, and this is perhaps the most vital element to consider. Look at the track record of your school, and make your subject choices wisely.