Yes, I read a long thread on op-locks and Samba earlier.  At least in 
Samba you can still handle oplocks per share, by file extension or turn 
them off completely.

On 1/21/2020 1:56 PM, Steven Green wrote:
> agreed.. please share anything you notice, in that regard.. my oplocks 
> thread in this section seems to be related
> 
> -- 
> 
> Steven Green
> Myrtle Beach, South Carolina, USA
> 
> http://www.OasisTradingPost.com
> 
> Collectibles and Memorabilia
> Vintage Lego Sets and Parts
> - and Paradox support, too
> "Mark Bannister"  wrote in message 
> news:5e270dd6$1@pnews.thedbcommunity.com...
> 
> We upgraded our Samba server and had issues with paradox.  Turned out to
> be ACl problems but in discussing SMB1 with the Samba mail list they
> strongly suggested moving away from anything dependent on it like the
> BDE.  A.) There are know vulnerabilities (although mitigated by some
> updates and virus software).  B.) MS doesn't want to support it anymore.
> 
> We've been warning for years that the BDE would someday be unworkable
> but that day may be getting closer.  While there are workarounds none of
> them are easy.
> 
> Happy Tuesday everyone!
> -- 
> Mark B