>>Which arguments do you have to not move fully to SQL Server and abandon VFP Tables?
>
>Some arguments were given earlier in this thread:
>1- support clients who can't afford or don't want a SQL database

I know some guys here who simply have their customers invest few dozen euros into an old box and then install linux/postgress (or mysql) on it and use ODBC to connect to that. The differences in SQL dialects between these languages and TSQL are fewer than between VFP sql and any one of them.

>2- be able to migrate clients one by one without supporting 2 code bases

I've seen this done (and participated in that on at least one project) and yes it can be done as long as the queries are at sql-1992 level, i.e. no platform specific functions are used.