question about True RC lipos

[RUSTY XL-5]

I was wondering if they are worth it? Almost everybody at the traxxas forum talks down about them...but can bl systems really pull more amps than they can supply? (I know they give less amps than max amps). If bl systems cant pull more amps that a true RC lipo gives I should be fine right? (aside from the purple shrink wrap lol)

Im asking because if Max amps is the only way to go, I dont think I'll ever go lipo but if the True RC lipos are fine I should be able to go lipo this year! (in both my rustler and E-Revo)