ACID vs YAGNI
ACID (Atomicity, Consistency, Isolation, Durability) and YAGNI (You Aren't Gonna Need It) both come up in technology conversations and get confused. Here's the plain-English difference, side by side, so you can use each one with confidence.
The key difference: ACID refers to atomicity, consistency, isolation, durability, while YAGNI refers to you aren't gonna need it — they describe different things even when they show up in the same sentence.
ACID — Atomicity, Consistency, Isolation, Durability
The four guarantees a traditional database transaction provides. ACID is why banks run on Postgres-style systems and not eventually-consistent stores.
YAGNI — You Aren't Gonna Need It
Principle that says don't build features until they're actually required. YAGNI is the antidote to speculative generality — most "we might need this someday" code never gets used.
When to use ACID
Reach for "ACID" when the conversation is specifically about atomicity, consistency, isolation, durability. The four guarantees a traditional database transaction provides. ACID is why banks run on Postgres-style systems and not eventually-consistent stores.
When to use YAGNI
Reach for "YAGNI" when the conversation is specifically about you aren't gonna need it. Principle that says don't build features until they're actually required. YAGNI is the antidote to speculative generality — most "we might need this someday" code never gets used.
FAQs
What is the difference between ACID and YAGNI?
ACID stands for Atomicity, Consistency, Isolation, Durability — The four guarantees a traditional database transaction provides. ACID is why banks run on Postgres-style systems and not eventually-consistent stores. YAGNI stands for You Aren't Gonna Need It — Principle that says don't build features until they're actually required. YAGNI is the antidote to speculative generality — most "we might need this someday" code never gets used.
Are ACID and YAGNI the same thing?
No. They're often used in the same conversation because they're related, but they describe different concepts. ACID = Atomicity, Consistency, Isolation, Durability. YAGNI = You Aren't Gonna Need It.
When should I use ACID vs YAGNI?
Use ACID when you're specifically referring to atomicity, consistency, isolation, durability. Use YAGNI when the topic is you aren't gonna need it.