Working hard between the Website WG and the T&S R&D WG to get out a room upgrading guide for #matrix - we will see how close we get to finish it in time for next week's room version security update release, but it already has lots of useful info in bullet point form: github.com/matrix-org/matrix.o…
If you have the time to help turn it into nice text (or even pictures?!!), please send patches!