With such a computer, the demands placed on its components are too big for ISA to handle. This feature is much like SCSI and speeds up the computer quite well. MCA was capable of bus mastering, plus it could look at other devices plugged into it and identify them, leading to automatic configuration. MCA also produced less electrical interference, reducing errors. MCA is history.
Nobody uses it.
All of those fancy videos and graphics require much speed. VESA buses are basically an ISA slot with an extra slot on the end. The whole thing is about 4 inches longer than an ISA slot. This is the other very fast bus developed by Intel. It is different than the VL-Bus except that it runs at the same speed.