Migrate site piece by piece

[Electrohx]

So I asked this question on the stream today and got a great answer, but Jeff also told me to drop off a new issue for this here so thats what i wanna do (Im not too familiar how theese issues work but I assume you look at them and decides if you wanna do a "tutorial" based on them or not)
So here goes my Q.

At work we have a app built in webforms that is gigantic (Big according to Jeff ;)) probably 150+ .aspx pages. So to rewrite this in Blazor is going to take pretty long time. Is there any way to like host the Blazor version alongside the existing and get them to work together and then swap out the old site piece by piece with the new? Or what would you suggest us to do?

(edits by csharpfritz to correct spelling only)

[csharpfritz]

This sounds like a pretty good set of samples and docs that we could build to help illustrate how to migrate to Blazor