They also provide security updates for those old OSes for quite a while, AFAIK.
macOS receives 1 year of full support and 2 additional years for security updates for each version with 6-8 years of upgrade eligibility. Windows 10 received 10 years of support (on top of a free upgrade from Windows 7/8.1 for most users).
alt Hacker News
macOS receives 1 year of full support and 2 additional years for security updates for each version with 6-8 years of upgrade eligibility. Windows 10 received 10 years of support (on top of a free upgrade from Windows 7/8.1 for most users).