Hi,
first I would like to say that I am in the audio industry but I'm commenting on tri-amping a system and not selling anything. I am currently fully electronic and I am tri-amping my system. For me the advantages are many.
If you look at a passive crossover and you look at the tolerance levels for each component in the passive crossover, each component has a tolerance level of approximately 5%. If the average passive crossover has 10 components then this means that the sound from the left to the right speaker can be very different by a large margin.
If you use a very high quality processor/electronic crossover that crosses over each of the six drivers individually and then the processor puts all the drivers in correct phase, then there is literally no phase issues and the sound from each driver/speaker arrives at the same time to each of your ears. I'm not saying that all passive speakers sound bad but I am saying that if the electronic processor has a very high quality external mic system and you can mic your room as will as electronically crossover your speakers over then it's going to be difficult to get a passive crossover that can remotely mimic all these variables.
Yes you need extra cables and yes you need extra amplifiers for the six channels of amplification. But in the end you do have much more control over your room acoustics and you are receiving a more accurate representation of the original recording. It also makes your speakers much more efficient.
These are just my opinions and again I'm not trying to sell anything but rather just giving my opinion based on many years of trying passive versus fully electronic.
Cheers Robert Neill.