Several aspects:
- If you are using properties for different SQL operations, then you can derive TMyQuery from FireDAC TADQuery. TMyQuery will create TADUpdateSQL and publish it XxxxSQL properties in TMyQuery interface. Also, you can introduce in TMyQuery other FIBPlus properties and methods, missed in FireDAC TADQuery.
- The similar approach you can use for other FIBPlus components to achieve high compatibility level between FireDAC and FIBPlus.
- You can use FireDAC addon tool - ADDFMChanger, to automate PAS / DFM migration from FIBPlus to FireDAC. The setup and migration then will be similar to BDE -> FireDAC migration. FireDAC / AnyDAC addons you can download from da-soft.com.
- The major migration issue may be difference in FireDAC / FIBPlus behaviours. I cannot comment here, because I have no experience with FIBPlus.