Basically all of the non-cloud Adobe products have been phased out. That means, as long as you never have to do a fresh install of the application, it will continue to run as long as your system runs. Fresh install means you wiped the target system drive prior to reinstalling. Reinstalling over an existing install is not a fresh install... the system remembers activation/serialization information.
The activation servers really have been decommissioned. There is no way to get activation information from them. Your system may still contain the required keys internally, but it is not verifying anything with a remote server at all. Hence why it is important NOT to wipe any system drive in which these products were previously installed.
Adobe is all about subscription based software now. Unlees you have a real need to save content in Adobe proprietary formats, consider some of the other alternatives out there that are not subscription based or free. Interface may be different, toolsets a little different but the base function is usually the same.