Accounts change outcomes
The same investment can create a different after-tax result in a taxable account, a tax-deferred account or a tax-free account. Interest, dividends, capital gains and ordinary income are not treated identically.
Asset location asks where each investment can operate most efficiently while still remaining available for its Purpose and Timing.
Tax efficiency is not the only test
Placing every tax-inefficient asset inside a retirement account may look efficient on a spreadsheet, but the account may be unavailable, taxable on withdrawal or poorly aligned with a near-term requirement.
Location must serve the whole Design. Liquidity, stability, expected return, withdrawal sequencing and future tax brackets all matter.
Coordinate before optimizing
First identify what the money must do and when it will be required. Then coordinate the investment and account type. Optimization without alignment can improve one metric while weakening the actual function of the wealth.