Shoes
Shoes are tools. Match the shoe to the work. The goal is not more shoes.
The goal is the right tool for the session.
Easy / Regulation
Most weekly running happens here, so the shoe should support durability and rhythm. Best for What matters Examples This shoe should disappear under the work.
Threshold
Threshold work needs efficiency and rhythm without becoming too aggressive. Best for What matters Examples Use the shoe that supports rhythm, not drama.
Race / Sharpening
Used sparingly when the work calls for maximum efficiency. Best for What matters Examples Save the sharpest tool for the right moment.
Rotation
A small rotation changes load patterns and extends the life of the shoes. Most runners do not need many shoes.
They need a clear reason for each one.