BC was amazing when it first came out
Oh yes it was, and combined with IC1...
Ducts are strictly superior to pipes.
I've played with them once, and found that they're a little too simple to set up for my tastes. Though, I don't usually use any pipes, and if I do, it's very short distance (maximum 12 blocks), and I use BC ones. Anything longer than that I use carts for.
BC Tanks are one of the least useful ways to store liquids
Yup. I remember when I got back into modded Minecraft in 1.4.7, and I set up my fuel processing system... I couldn't even see the top OR bottoms of my tanks from the surface. It was absurd. And not absurd in the good way...
I found I was never really using anything from BC any longer, so I removed it... and never really looked back since.
Fair enough. That's your decision, and I respect it. But, I'll keep my BC
Indeed. OpenBlocks Tanks lag, i dislike XU drums, and I've never used Mariculture or Mekanism.
I've never experienced any lag with OB tanks. Though, I can imagine where it would come from (dynamically slowly increasing the visual). If this really is a problem, you should let Mikee or one of the other OpenMods guys know.
XU drums seem cool, but eh, too boring and little.
I've never used Mariculture since I heard about the lag it caused with worldgen.
I mostly stopped using Mekanism after 1.5.2. I just got bored of it, tbh.
In my opinion those weren't really multiblocks. They were tanks that could store small amounts of fluid, and if another tank was below it, it would empty its contents into said tanks. Railcraft Tanks, on the other hand, range from 3x3x4 to 7x7x9 ( I think ), and form into a large structure with different textures. It stores very large amounts of fluid (I have a 5million mb mobessence tank) and can have several input and output slots.
Long story short, BC Tanks aren't really a multiblock. They're small liquid storage units that can interact with each other, nothing more.
Yes they are. Boring multi-blocks, sure, but they are multiblocks. You seem to be forgetting that all of the liquid goes immediately to the bottom of the tank, and they all have one collective inventory (if stacked).