It's believe it or not the cheapest from MSI, GIGABYTE & ASUS. Yes you could go BIOSTAR, but you'd not really do that to anyone voluntarily.
Just look at the Read IO on the ROG STRIX-E - $279
This is thew AORUS MASTER also $279
Taichi at $299
I would say ASUS has the worst Rear IO, Gigabyte has the best and ASRock closer to ASUS but better in the middle.
Moreover, the Taichi unlike any other board does x8/x8 splitting of the x16 lanes from the CPU. That has cost implications naturally, it is also the only board with Power, Reset Clear CMOS and Debug LED on the board
The PWM is obviously not as competent as the one on the Gigabyte board, but it is superior to that which was on the X570 Taichi and that's also a $300 board ($296 -
Here). It has two additional phases (16) on top of using 60A power stages vs the 14 phase, 50A power stage ICs on the X570.
So as a complete offering, the B550 Taichi is hard to beat. Doesn't stand out in any one category but as a whole, ticks all the boxes other boards simply do not.