Myth of needing three different capacitor values for decoupling circuits.

Research and discuss the myth of needing three different capacitor values for decoupling circuits.
Research and discuss Equivalent Series Inductance (ESL) values for Multi-Layer Ceramic Capacitors (MLCC).
Why are three different capacitors less ideal for decoupling now when this was not true for older circuits?
What causes a high ESL in a capacitor and how does the MLCC design overcome this barrier?
How is capacitor technology continuing to evolve and what types of engineers are contributing?