I've been playing since season 4 I think? Jinx was new when I joined. I now own 17 champions and 6 rune pages. (AP, AD, Spellvamp, AP Mixed, AD Mixed, GP10. That's 4 different types of quints, 4 different types of marks, 2 types of seals, and 1 type of glyph) I have a ton of IP (5 digit) saved up, but I still wouldn't be able to afford 

Clearly you aren't meant to ever have everything accessible to you.
The prices on the champions aren't necessarily out of order, (spending actual cash on it is absurd though) but having to choose between two really expensive champions or a rune page and unique runes for it after literal days of playing is a bit ridiculous.
I pretty much only buy champions I like playing and have played before, and I suppose that's how it was intended, but I don't have that much motivating factors encouraging me to leave my comfort zones. Of my 17-deep champion pool, 17 are ranged, 15 are AP (Although I play one of the ADs (Miss Fortune) as AP more often anyway) and absolutely none of them are tanks or junglers. The closest thing to a jungler I have is Lulu, and the closest thing to a tank I have is Vlad, and last I checked 




doesn't make me a tank.
In any case, more IP would be welcome. Maybe then trying new things wouldn't be such a significant risk.