Why doesn't Microsoft provide support for older browsers and Blazor WASM

I've built my site using Blazor WASM. I need to provide guidance to our call center when a user calls and asks whether the site works in Chrome version xyz etc.

Microsoft supports the "Current" version.

https://learn.microsoft.com/en-us/aspnet/core/blazor/supported-platforms?view=aspnetcore-7.0

This isn't particularly helpful since we can only advise users - "make sure Chrome is up to date and try again".

Does "Current" mean "Stable Release"? https://en.wikipedia.org/wiki/Google_Chrome_version_history

Is there a reason why Microsoft doesn't support N-1? I noticed Microsoft takes this approach to Azure Portal as well. I'm wondering if this is an industry trend.

https://learn.microsoft.com/en-us/azure/azure-portal/azure-portal-supported-browsers-devices

Blazor wasm is supported by older versions of browsers that supports wasm (Chrome, Firefox, Edge, Opera).

The initial version of wasm for each browser is listed here: source: https://developer.mozilla.org/en-US/docs/WebAssembly

In theory these versions should support blazor wasm.

That said... Microsoft putting current+ is misleading.