TL;DR: Has anybody tried testing whether Mojave's Time Machine application supports APFS volumes?
I was excited to check out APFS when High Sierra came out, and upgraded all my volumes (including my Time Machine volume) to APFS. It was only after that that I realized that Time Machine doesn't yet support APFS, as documented here and discussed previously in the beta forums for 10.13 (High Sierra).
I can personally work around it by using Disk Utility to add a partition with a legacy filesystem and shrinking my APFS volume to just big enough to keep my legacy data and Time Machine backups, but your average non-developer user would struggle with this, so just wondering if anybody has tried this yet. (I don't have a spare Mac that I feel comfortable installing Mojave beta on prior to the official release.)
Thanks in advance to anybody who comments.