My employer is running a legacy version of Business Central (On-Prem) - Spring '19 Release. I do not have access to a Sandbox on this old release.
My AL Extension in Visual Studio Code is created for runtime 3.0 (Last line of app.json : "runtime": "3.0") which is associated with the release above. I'm using a Microsoft Cloud Sandbox for testing on Version: GB Business Central 19.3 (Platform 19.0.34506.35781 + Application 19.3.34541.34662). The extension is currently compiling and functioning without error.
Should I experience any syntax compatibility issues when deployed to my employer's legacy installation?