CAVEAT: This is not intended to be extremely reliable information and I cannot give a source for now. Anyone finding this information should keep in mind that the context is related to the Power BI managed VNET gateway. I don't have any certainty that this information extends to other platforms that use "managed vnets" (eg ADF and Synapse).
On the Power BI Gateway side of things, I have confirmation of two changes coming in 2024 that might make an improvement. See below. These changes are for the "Azure Network stack"
- Feature ending with x509 : Support map space deletion in VFP without breaking flows.
(virtual filtering platform, ie switch?)
The ETA publicized is late 2024
- Bug ending with x810 : PE-NC Flow mix up
Network team promised to roll it out early 2024.
... Please note that the Power BI Managed VNET Gateway is still in preview, so it is reasonable that there are ongoing changes that would improve reliability. (The only unreasonable part is waiting 3 or 4 years for the GA.)
In contrast to Power BI, I am not having as much luck with some other PG teams. I'm still waiting on a couple other PG teams to explain their managed vnet problems as well (eg. ADF and Synapse). This may take a while. I have made zero progress in the past month, despite spending dozens of hours with the ADF/Synapse organizations at CSS. Any information that I am able to gather by way of CSS is very hard to come by! CSS is quite different than unified support, to put it lightly. Your Azure Account Manager will be very eager to point you to one of these, but not the other.