This does help, thank you! I attended the Learning Q&A call yesterday and asked about the Horizon theme timeline for validated customers. SAP referred to the FAQ on this post: Migration from Quartz Visual Theme to Horizon Visu... - SAP Community Grou...
I also opened a ticket. SAP support said we didn't have to worry about the issue impacting PROD, but provided no further details. Are we to be excluded from universal push to Horizon theming update? What is the timeline then for VSaaS LMS customers? ...