SAP BTP Neo - WebIDE Support on Front End Server Upgrade

Hi,

I am on SAP BTP Neo using WebIDE.

1) Does upgrading Front End server (like from 5.0 to 6.0) will have any requirement to move from WebIde to BAS ?

2) Or FES upgrade has nothing to do with WebIde ?

3) Finally, may I know if I can have both WebIde and Neo enabled on my SAP BTP Neo ?