Google company deprecation schedule for specialized web applications in the Chrome browser. In March 2020, the Chrome Web Store will stop accepting new Chrome Apps (the ability to update existing apps will last until June 2022). In June 2020, support for Chrome Apps will end on Windows, Linux, and macOS versions of Chrome Browser, but an option will remain until December to bring back Chrome Apps for Chrome Enterprise and Chrome Education users.
In June 2021, support for the NaCl (Native Client), PNaCl (Portable Native Client, WebAssembly) and PPAPI (Pepper API for plugin development, which replaced NPAPI), as well as the ability to use Chrome Apps on Chrome OS (Chrome Enterprise and Chrome Education users will retain the option to return support for Chrome Apps until June 2022). The decision affects only Chrome Apps and does not affect browser add-ons (Chrome Extensions), support for which remains unchanged. It is noteworthy that initially Google announced its intention to phase out Chrome Apps back in 2016 and intended to stop supporting them until 2018, but then shelved this plan.
The move to universal web apps and technology is cited as a reason for deprecating custom Chrome Apps (P.W.A.). If during the appearance of Chrome Apps many advanced features, such as tools for working offline, sending notifications and interacting with equipment, were not defined in regular Web APIs, now they are standardized and available for any web applications. In addition, Chrome Apps technology has not been widely adopted on desktop systems - only about 1% of Chrome users for Linux, Windows and macOS use these applications. Most Chrome Apps packages already have counterparts implemented as regular web apps or browser add-ons. Prepared for Chrome Apps developers on migration to regular web-technologies.
Source: opennet.ru