The "write it twice" strategy should be more common.
The alternative is "write it once and be stuck with it". You want tech debt, cause that's how you get tech debt.
By definition, the first time you do something, you will learn a ton. So you've gained two things: 1) hard-won technical knowledge and 2) a bunch of sub-optimal code written before you obtained that knowledge. The way I see it, keeping that proof-of-concept code around forever is a terrible tradeoff - giving up #1 to save #2 at any cost. Code isn't that special, especially on the first pass.
The alternative is "write it once and be stuck with it". You want tech debt, cause that's how you get tech debt.
By definition, the first time you do something, you will learn a ton. So you've gained two things: 1) hard-won technical knowledge and 2) a bunch of sub-optimal code written before you obtained that knowledge. The way I see it, keeping that proof-of-concept code around forever is a terrible tradeoff - giving up #1 to save #2 at any cost. Code isn't that special, especially on the first pass.