Too Long; Didn't Read
On-demand Incremental Static Regeneration (ISR) enables developers and content editors to use static-generation on a per-page basis, without needing to rebuild the entire site. With ISR, you can retain the benefits of static while scaling to millions of pages. Next.js 12.1 (released today) has introduced on-demand ISR which gives developers the flexibility to manually purge the Next.js cache for a page on-Demand. ISR is already great and is used by many companies to drastically improve their bulid times while retaining incredible performance.