Yes, that's true. It's a matter of priorities, I'd say: You can have correct data, or you can get data fast.
Even when the issues that occurred in 2018 Windows 10 1809 (IIRC) aren't a problem any more (in my experience at least) ?
Also if you are running recent Windows 10 and Server 2019 you can set UseWriteThrough on the server on a per-share basis, so if you really want writes to your VFP data to go straight to disk at all times then you can do that for your VFP share without crippling everything else on the network.
https://techcommunity.microsoft.com/t5/storage-at-microsoft/controlling-writ...