PowerServer 2020 supports 3 deployment modes:
1. Web browser plugin for Windows OS
2. Installable Web App (IWA) for Windows OS
3. Mobile app for iOS and Android
PowerServer 2021 will only support deployment mode #2. And we are renaming this from Installable Web App to Desktop Cloud App since under the hood it is no longer converting to JavaScript and instead using PowerScript natively.
For our existing PowerServer customers that need to continue using deployment mode #1 and/or #3, we are putting PowerServer 2020 into long-term support, which is a minimum of 5 years and possibly longer depending on the market situation.