I found an internal suggestion that using “Page Tags” instead of (or as well as) “Tags” to wiki-link among pages may be the way to make it reverse-compatible (DB-to-MD).
I say “MD” where you say “OG”.
My interest in MD-compatibility is for web and PWA (Portable Web App) compatibility. Using tablet, phone, Android etc.
demo.logseq.com is Logseq-MD using browser and local file system
test.logseq.com is Logseq-DB using browser and local file system
I appreciate the full power of DB, using the full Schema.org data structure, but it takes a lot of work setting-up and getting used to it.
It seems that full round-trip compatibility is an ambition for the developers, but a public version launch (not Beta) must be their priority. I did not get much hope from that linked thread.