Next.js: Оптимизация шрифтов — компромиссы и trade-offs

System fonts fastest; next/font build-time coupling; variable fonts collapse weight files.

Разбор

• Overkill при system font stack (system-ui, -apple-system) — no web font, fastest, next/font adds nothing.
• Build-time coupling. Fonts resolved next build — must import at build. Fully dynamic user-chosen fonts runtime — не fit model.
• Self-hosting — you own bytes. Lose Google cross-site cache — mostly killed by cache partitioning — rarely real loss; gain privacy + one fewer origin.
• Non-variable fonts multiply files. Each weight/style separate preload; variable font — one file all weights.

Итог

System fonts when possible; next/font for web fonts with build-time subsetting and metric fallback.