3. There is no documented "Long Term Support". But documentation says it should work as long as you are running same or lower version than CSU. The below article is outdated with no reference to Commerce App, but should give some idea.
3. There is no documented "Long Term Support". But documentation says it should work as long as you are running same or lower version than CSU. The below article is outdated with no reference to Commerce App, but should give some idea.