Hi Chris,
No specific roadmap that I'm aware of to move the self-hosted product suite as a whole to .NET 5. Worth noting that the General Availability release of .NET 5 was less than a month ago on Nov 10, 2020.
.NET 5 is not a Long Term Servicing (LTS) release either - that will come with .NET 6 in Nov 2021.
The current versions of most Laserfiche applications use .NET Framework 4.7 or 4.8 (the latest). Microsoft ties support for .NET Framework to the operating system versions it ships with, and so will remain supported though at least 1/9/2029 with Windows Server 2019. (Lest there be any concerns about .NET Framework 4.8 losing support any time soon).
Depending on where you are with the prospect, you might ask why they're interested in if Laserfiche is moving to .NET 5. The actual reason might be something indirectly related, like "Will we be able to run Laserfiche on Linux instead of Windows Server?" because .NET 5 has cross-platform support.
Or maybe they're interested in building an integration using the SDK with the Azure Functions v3 runtime, which only supports .NET Core/.NET 5. That's a clearly scoped use case and meaningfully different from suite-wide support. Migrating components like Snapshot or Scanning or even Workflow to .NET 5 wouldn't have any impact there, while .NET 5 SDK libraries would.
In short, it's something we're aware of and keeping an eye on. If there's a specific reason this prospect is interested in .NET 5, we might be able to give a more specific answer that speaks to that case.
Cheers,
Sam