I'd assume long term they're going to do more with TPMs. Once they start pushing patches that require a TPM, unsupported configurations won't be able to receive that update.
Are you still on insider? Isn't that more related to the fact that it went from "beta" / preview to "ready"?
I used to be on the Win10 insider ring for a few months a while back, to try WSL2 and I seem to remember updates were more frequent. Otherwise, I seem to get one update per month for a regular win10 pro install.