Depends on the revenue they bring vs the cost of serving them. It's highly dependent on market/business/company.

Often you simply don't offer the feature. E.g 3d rendered previews may not be available but product configuration and cart keeps working on a shop selling custom showers (you fallback to dynamic static images).

In real estate a page displaying fancy maps with price statistics by area/neighborhood might be unavailable, but the core business of listings and search does.